97431399 has 12 divisors (see below), whose sum is σ = 151560136. Its totient is φ = 59957712.

The previous prime is 97431379. The next prime is 97431401. The reversal of 97431399 is 99313479.

It is not a de Polignac number, because 97431399 - 2⁹ = 97430887 is a prime.

It is a super-2 number, since 2×97431399² = 18985755022194402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97431349) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 416257 + ... + 416490.

Almost surely, 2^97431399 is an apocalyptic number.

97431399 is a deficient number, since it is larger than the sum of its proper divisors (54128737).

97431399 is a wasteful number, since it uses less digits than its factorization.

97431399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832766 (or 832763 counting only the distinct ones).

The product of its digits is 183708, while the sum is 45.

The square root of 97431399 is about 9870.7344711526. The cubic root of 97431399 is about 460.1502329082.

The spelling of 97431399 in words is "ninety-seven million, four hundred thirty-one thousand, three hundred ninety-nine".