97638717393 has 24 divisors (see below), whose sum is σ = 164610770688. Its totient is φ = 54606454272.

The previous prime is 97638717377. The next prime is 97638717401. The reversal of 97638717393 is 39371783679.

It is not a de Polignac number, because 97638717393 - 2⁴ = 97638717377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 97638717393.

It is not an unprimeable number, because it can be changed into a prime (97638717353) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16484496 + ... + 16490417.

It is an arithmetic number, because the mean of its divisors is an integer number (6858782112).

Almost surely, 2^97638717393 is an apocalyptic number.

It is an amenable number.

97638717393 is a deficient number, since it is larger than the sum of its proper divisors (66972053295).

97638717393 is a wasteful number, since it uses less digits than its factorization.

97638717393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32974973 (or 32974970 counting only the distinct ones).

The product of its digits is 36006768, while the sum is 63.

The spelling of 97638717393 in words is "ninety-seven billion, six hundred thirty-eight million, seven hundred seventeen thousand, three hundred ninety-three".