97431517 has 4 divisors (see below), whose sum is σ = 99504576. Its totient is φ = 95358460.

The previous prime is 97431497. The next prime is 97431533. The reversal of 97431517 is 71513479.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71513479 = 163 ⋅438733.

It is a cyclic number.

It is not a de Polignac number, because 97431517 - 2²³ = 89042909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97431557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1036459 + ... + 1036552.

It is an arithmetic number, because the mean of its divisors is an integer number (24876144).

Almost surely, 2^97431517 is an apocalyptic number.

It is an amenable number.

97431517 is a deficient number, since it is larger than the sum of its proper divisors (2073059).

97431517 is a wasteful number, since it uses less digits than its factorization.

97431517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2073058.

The product of its digits is 26460, while the sum is 37.

The square root of 97431517 is about 9870.7404484162. The cubic root of 97431517 is about 460.1504186721.

The spelling of 97431517 in words is "ninety-seven million, four hundred thirty-one thousand, five hundred seventeen".