97638717391 has 8 divisors (see below), whose sum is σ = 97929967104. Its totient is φ = 97347657600.

The previous prime is 97638717377. The next prime is 97638717401. The reversal of 97638717391 is 19371783679.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 97638717391 - 2¹⁷ = 97638586319 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 (97638717301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1017691 + ... + 1109491.

It is an arithmetic number, because the mean of its divisors is an integer number (12241245888).

Almost surely, 2^97638717391 is an apocalyptic number.

97638717391 is a deficient number, since it is larger than the sum of its proper divisors (291249713).

97638717391 is a wasteful number, since it uses less digits than its factorization.

97638717391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94961.

The product of its digits is 12002256, while the sum is 61.

The spelling of 97638717391 in words is "ninety-seven billion, six hundred thirty-eight million, seven hundred seventeen thousand, three hundred ninety-one".