99981592 has 16 divisors (see below), whose sum is σ = 188618040. Its totient is φ = 49683456.

The previous prime is 99981571. The next prime is 99981593. The reversal of 99981592 is 29518999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99981593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37033 + ... + 39640.

Almost surely, 2^99981592 is an apocalyptic number.

It is an amenable number.

99981592 is a deficient number, since it is larger than the sum of its proper divisors (88636448).

99981592 is a wasteful number, since it uses less digits than its factorization.

99981592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76842 (or 76838 counting only the distinct ones).

The product of its digits is 524880, while the sum is 52.

The square root of 99981592 is about 9999.0795576393. The cubic root of 99981592 is about 464.1304008244.

The spelling of 99981592 in words is "ninety-nine million, nine hundred eighty-one thousand, five hundred ninety-two".