71091992 has 16 divisors (see below), whose sum is σ = 137894400. Its totient is φ = 34320160.

The previous prime is 71091973. The next prime is 71092033. The reversal of 71091992 is 29919017.

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, 152984 + ... + 153447.

It is an arithmetic number, because the mean of its divisors is an integer number (8618400).

Almost surely, 2^71091992 is an apocalyptic number.

It is an amenable number.

71091992 is a deficient number, since it is larger than the sum of its proper divisors (66802408).

71091992 is a wasteful number, since it uses less digits than its factorization.

71091992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306466 (or 306462 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 38.

The square root of 71091992 is about 8431.6067270717. The cubic root of 71091992 is about 414.2605344302.

The spelling of 71091992 in words is "seventy-one million, ninety-one thousand, nine hundred ninety-two".