81341976 has 32 divisors (see below), whose sum is σ = 204963840. Its totient is φ = 26899488.

The previous prime is 81341963. The next prime is 81341987. The reversal of 81341976 is 67914318.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10296 + ... + 16391.

It is an arithmetic number, because the mean of its divisors is an integer number (6405120).

Almost surely, 2^81341976 is an apocalyptic number.

It is an amenable number.

81341976 is an abundant number, since it is smaller than the sum of its proper divisors (123621864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81341976 is a wasteful number, since it uses less digits than its factorization.

81341976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26823 (or 26819 counting only the distinct ones).

The product of its digits is 36288, while the sum is 39.

The square root of 81341976 is about 9018.9786561451. The cubic root of 81341976 is about 433.2829232616.

The spelling of 81341976 in words is "eighty-one million, three hundred forty-one thousand, nine hundred seventy-six".