81759092 has 12 divisors (see below), whose sum is σ = 143144736. Its totient is φ = 40860600.

The previous prime is 81759079. The next prime is 81759113. The reversal of 81759092 is 29095718.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10217 + ... + 16367.

It is an arithmetic number, because the mean of its divisors is an integer number (11928728).

Almost surely, 2^81759092 is an apocalyptic number.

It is an amenable number.

81759092 is a deficient number, since it is larger than the sum of its proper divisors (61385644).

81759092 is a wasteful number, since it uses less digits than its factorization.

81759092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9478 (or 9476 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 81759092 is about 9042.0734347825. The cubic root of 81759092 is about 434.0222758215.

The spelling of 81759092 in words is "eighty-one million, seven hundred fifty-nine thousand, ninety-two".