97538936791 has 2 divisors, whose sum is σ = 97538936792. Its totient is φ = 97538936790.

The previous prime is 97538936783. The next prime is 97538936897. The reversal of 97538936791 is 19763983579.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97538936791 - 2³ = 97538936783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97538136791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48769468395 + 48769468396.

It is an arithmetic number, because the mean of its divisors is an integer number (48769468396).

Almost surely, 2^97538936791 is an apocalyptic number.

97538936791 is a deficient number, since it is larger than the sum of its proper divisors (1).

97538936791 is an equidigital number, since it uses as much as digits as its factorization.

97538936791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77157360, while the sum is 67.

The spelling of 97538936791 in words is "ninety-seven billion, five hundred thirty-eight million, nine hundred thirty-six thousand, seven hundred ninety-one".