97313921 has 2 divisors, whose sum is σ = 97313922. Its totient is φ = 97313920.

The previous prime is 97313911. The next prime is 97313939. The reversal of 97313921 is 12931379.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56851600 + 40462321 = 7540^2 + 6361^2 .

It is an emirp because it is prime and its reverse (12931379) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97313921 is a prime.

It is not a weakly prime, because it can be changed into another prime (97313911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48656960 + 48656961.

It is an arithmetic number, because the mean of its divisors is an integer number (48656961).

Almost surely, 2^97313921 is an apocalyptic number.

It is an amenable number.

97313921 is a deficient number, since it is larger than the sum of its proper divisors (1).

97313921 is an equidigital number, since it uses as much as digits as its factorization.

97313921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10206, while the sum is 35.

The square root of 97313921 is about 9864.7818526311. The cubic root of 97313921 is about 459.9652163364.

The spelling of 97313921 in words is "ninety-seven million, three hundred thirteen thousand, nine hundred twenty-one".