80917881 has 8 divisors (see below), whose sum is σ = 117698784. Its totient is φ = 49041120.

The previous prime is 80917849. The next prime is 80917897. The reversal of 80917881 is 18871908.

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

It is not a de Polignac number, because 80917881 - 2⁵ = 80917849 is a prime.

It is a super-2 number, since 2×80917881² = 13095406931060322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (80917481) 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, 1225996 + ... + 1226061.

It is an arithmetic number, because the mean of its divisors is an integer number (14712348).

Almost surely, 2^80917881 is an apocalyptic number.

It is an amenable number.

80917881 is a deficient number, since it is larger than the sum of its proper divisors (36780903).

80917881 is a wasteful number, since it uses less digits than its factorization.

80917881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2452071.

The product of its (nonzero) digits is 32256, while the sum is 42.

The square root of 80917881 is about 8995.4366764488. The cubic root of 80917881 is about 432.5286042538.

The spelling of 80917881 in words is "eighty million, nine hundred seventeen thousand, eight hundred eighty-one".