97739392689 has 21 divisors (see below), whose sum is σ = 146554709353. Its totient is φ = 65153967732.

The previous prime is 97739392651. The next prime is 97739392759. The reversal of 97739392689 is 98629393779.

The square root of 97739392689 is 312633.

It is a perfect power (a square), and thus also a powerful number.

97739392689 is a `hidden beast` number, since 9 + 77 + 393 + 92 + 6 + 89 = 666.

It is not a de Polignac number, because 97739392689 - 2¹³ = 97739384497 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 (97739392649) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 8435302 + ... + 8446880.

Almost surely, 2^97739392689 is an apocalyptic number.

97739392689 is the 312633-rd square number.

97739392689 is the 156317-th centered octagonal number.

It is an amenable number.

97739392689 is a deficient number, since it is larger than the sum of its proper divisors (48815316664).

97739392689 is an frugal number, since it uses more digits than its factorization.

97739392689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23176 (or 11582 counting only the distinct ones).

The product of its digits is 277766496, while the sum is 72.

The spelling of 97739392689 in words is "ninety-seven billion, seven hundred thirty-nine million, three hundred ninety-two thousand, six hundred eighty-nine".