80916291 has 12 divisors (see below), whose sum is σ = 117258960. Its totient is φ = 53768880.

The previous prime is 80916287. The next prime is 80916301. The reversal of 80916291 is 19261908.

It is not a de Polignac number, because 80916291 - 2² = 80916287 is a prime.

It is a super-2 number, since 2×80916291² = 13094892298393362, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (80916221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11656 + ... + 17253.

It is an arithmetic number, because the mean of its divisors is an integer number (9771580).

Almost surely, 2^80916291 is an apocalyptic number.

80916291 is a deficient number, since it is larger than the sum of its proper divisors (36342669).

80916291 is a wasteful number, since it uses less digits than its factorization.

80916291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29226 (or 29223 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 80916291 is about 8995.3482978704. The cubic root of 80916291 is about 432.5257712377.

The spelling of 80916291 in words is "eighty million, nine hundred sixteen thousand, two hundred ninety-one".