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76889081 = 251306331
BaseRepresentation
bin1001001010100…
…11101111111001
312100200100222202
410211103233321
5124140422311
611343555545
71622355263
oct445235771
9170610882
1076889081
113a4469a5
12218bbbb5
1312c113c9
14a2d6b33
156b3be3b
hex4953bf9

76889081 has 4 divisors (see below), whose sum is σ = 77195664. Its totient is φ = 76582500.

The previous prime is 76889051. The next prime is 76889089. The reversal of 76889081 is 18098867.

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 76889081 - 26 = 76889017 is a prime.

It is a super-2 number, since 2×768890812 = 11823861554049122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76889089) 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, 152915 + ... + 153416.

It is an arithmetic number, because the mean of its divisors is an integer number (19298916).

Almost surely, 276889081 is an apocalyptic number.

It is an amenable number.

76889081 is a deficient number, since it is larger than the sum of its proper divisors (306583).

76889081 is a wasteful number, since it uses less digits than its factorization.

76889081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306582.

The product of its (nonzero) digits is 193536, while the sum is 47.

The square root of 76889081 is about 8768.6419130901. The cubic root of 76889081 is about 425.2277091167.

The spelling of 76889081 in words is "seventy-six million, eight hundred eighty-nine thousand, eighty-one".

Divisors: 1 251 306331 76889081