81497932 has 24 divisors (see below), whose sum is σ = 152216064. Its totient is φ = 38045952.

The previous prime is 81497921. The next prime is 81497957. The reversal of 81497932 is 23979418.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

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, 3918 + ... + 13354.

It is an arithmetic number, because the mean of its divisors is an integer number (6342336).

Almost surely, 2^81497932 is an apocalyptic number.

It is an amenable number.

81497932 is a deficient number, since it is larger than the sum of its proper divisors (70718132).

81497932 is a wasteful number, since it uses less digits than its factorization.

81497932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9585 (or 9583 counting only the distinct ones).

The product of its digits is 108864, while the sum is 43.

The square root of 81497932 is about 9027.6205059805. The cubic root of 81497932 is about 433.5596558710.

The spelling of 81497932 in words is "eighty-one million, four hundred ninety-seven thousand, nine hundred thirty-two".