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8077081 = 31260551
BaseRepresentation
bin11110110011111100011001
3120012100200011
4132303330121
54031431311
6445041521
7125440225
oct36637431
916170604
108077081
114617481
1228562a1
13189a54c
141103785
15a98321
hex7b3f19

8077081 has 4 divisors (see below), whose sum is σ = 8337664. Its totient is φ = 7816500.

The previous prime is 8077079. The next prime is 8077129. The reversal of 8077081 is 1807708.

8077081 = T2319 + T2320 + T2321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8077081 - 21 = 8077079 is a prime.

It is a super-2 number, since 2×80770812 = 130478474961122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 260551 = 8077081 / (8 + 0 + 7 + 7 + 0 + 8 + 1).

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (8077001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130245 + ... + 130306.

It is an arithmetic number, because the mean of its divisors is an integer number (2084416).

Almost surely, 28077081 is an apocalyptic number.

8077081 is the 2321-st centered triangular number.

It is an amenable number.

8077081 is a deficient number, since it is larger than the sum of its proper divisors (260583).

8077081 is a wasteful number, since it uses less digits than its factorization.

8077081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260582.

The product of its (nonzero) digits is 3136, while the sum is 31.

The square root of 8077081 is about 2842.0205840212. The cubic root of 8077081 is about 200.6402896251.

The spelling of 8077081 in words is "eight million, seventy-seven thousand, eighty-one".

Divisors: 1 31 260551 8077081