80891967 has 24 divisors (see below), whose sum is σ = 123404176. Its totient is φ = 46844928.

The previous prime is 80891963. The next prime is 80891999. The reversal of 80891967 is 76919808.

It is a happy number.

It is not a de Polignac number, because 80891967 - 2² = 80891963 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80891963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7683 + ... + 14859.

Almost surely, 2^80891967 is an apocalyptic number.

80891967 is a deficient number, since it is larger than the sum of its proper divisors (42512209).

80891967 is a wasteful number, since it uses less digits than its factorization.

80891967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7227 (or 7210 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 48.

The square root of 80891967 is about 8993.9961641086. The cubic root of 80891967 is about 432.4824268089.

The spelling of 80891967 in words is "eighty million, eight hundred ninety-one thousand, nine hundred sixty-seven".