97574489917 has 2 divisors, whose sum is σ = 97574489918. Its totient is φ = 97574489916.

The previous prime is 97574489899. The next prime is 97574489927. The reversal of 97574489917 is 71998447579.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97556900281 + 17589636 = 312341^2 + 4194^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97574489917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97574489927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48787244958 + 48787244959.

It is an arithmetic number, because the mean of its divisors is an integer number (48787244959).

Almost surely, 2^97574489917 is an apocalyptic number.

It is an amenable number.

97574489917 is a deficient number, since it is larger than the sum of its proper divisors (1).

97574489917 is an equidigital number, since it uses as much as digits as its factorization.

97574489917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 160030080, while the sum is 70.

The spelling of 97574489917 in words is "ninety-seven billion, five hundred seventy-four million, four hundred eighty-nine thousand, nine hundred seventeen".