99997732 has 12 divisors (see below), whose sum is σ = 175271040. Its totient is φ = 49920296.

The previous prime is 99997691. The next prime is 99997759. The reversal of 99997732 is 23779999.

It is a nialpdrome in base 10.

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, 16732 + ... + 21907.

It is an arithmetic number, because the mean of its divisors is an integer number (14605920).

Almost surely, 2^99997732 is an apocalyptic number.

It is an amenable number.

99997732 is a deficient number, since it is larger than the sum of its proper divisors (75273308).

99997732 is a wasteful number, since it uses less digits than its factorization.

99997732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39290 (or 39288 counting only the distinct ones).

The product of its digits is 1928934, while the sum is 55.

The square root of 99997732 is about 9999.8865993570. The cubic root of 99997732 is about 464.1553742936.

The spelling of 99997732 in words is "ninety-nine million, nine hundred ninety-seven thousand, seven hundred thirty-two".