97992729 has 6 divisors (see below), whose sum is σ = 141545066. Its totient is φ = 65328480.

The previous prime is 97992703. The next prime is 97992731. The reversal of 97992729 is 92729979.

It can be written as a sum of positive squares in only one way, i.e., 91642329 + 6350400 = 9573^2 + 2520^2 .

It is not a de Polignac number, because 97992729 - 2⁸ = 97992473 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (97992799) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5444032 + ... + 5444049.

Almost surely, 2^97992729 is an apocalyptic number.

It is an amenable number.

97992729 is a deficient number, since it is larger than the sum of its proper divisors (43552337).

97992729 is a wasteful number, since it uses less digits than its factorization.

97992729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10888087 (or 10888084 counting only the distinct ones).

The product of its digits is 1285956, while the sum is 54.

The square root of 97992729 is about 9899.1276888421. The cubic root of 97992729 is about 461.0322267190.

The spelling of 97992729 in words is "ninety-seven million, nine hundred ninety-two thousand, seven hundred twenty-nine".