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80803061 = 475916979
BaseRepresentation
bin1001101000011…
…11010011110101
312122001012221222
410310033103311
5131141144221
612003520125
72000546303
oct464172365
9178035858
1080803061
114167a599
1223089045
1313981a81
14aa35273
1571619ab
hex4d0f4f5

80803061 has 4 divisors (see below), whose sum is σ = 80824800. Its totient is φ = 80781324.

The previous prime is 80803031. The next prime is 80803069. The reversal of 80803061 is 16030808.

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 a de Polignac number, because none of the positive numbers 2k-80803061 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80803061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80803069) 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, 3731 + ... + 13248.

It is an arithmetic number, because the mean of its divisors is an integer number (20206200).

Almost surely, 280803061 is an apocalyptic number.

It is an amenable number.

80803061 is a deficient number, since it is larger than the sum of its proper divisors (21739).

80803061 is a wasteful number, since it uses less digits than its factorization.

80803061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21738.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 80803061 is about 8989.0522859754. The cubic root of 80803061 is about 432.3239257892.

Adding to 80803061 its reverse (16030808), we get a palindrome (96833869).

The spelling of 80803061 in words is "eighty million, eight hundred three thousand, sixty-one".

Divisors: 1 4759 16979 80803061