76971881 has 8 divisors (see below), whose sum is σ = 89207424. Its totient is φ = 65046240.

The previous prime is 76971863. The next prime is 76971889. The reversal of 76971881 is 18817967.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 76971881 - 2²² = 72777577 is a prime.

It is a super-2 number, since 2×76971881² = 11849340929356322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76971889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76940 + ... + 77933.

It is an arithmetic number, because the mean of its divisors is an integer number (11150928).

Almost surely, 2^76971881 is an apocalyptic number.

76971881 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

76971881 is a deficient number, since it is larger than the sum of its proper divisors (12235543).

76971881 is a wasteful number, since it uses less digits than its factorization.

76971881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154951.

The product of its digits is 169344, while the sum is 47.

The square root of 76971881 is about 8773.3620123645. The cubic root of 76971881 is about 425.3802935187.

The spelling of 76971881 in words is "seventy-six million, nine hundred seventy-one thousand, eight hundred eighty-one".