97813321 has 2 divisors, whose sum is σ = 97813322. Its totient is φ = 97813320.

The previous prime is 97813307. The next prime is 97813337. The reversal of 97813321 is 12331879.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72863296 + 24950025 = 8536^2 + 4995^2 .

It is a cyclic number.

It is not a de Polignac number, because 97813321 - 2⁷ = 97813193 is a prime.

It is not a weakly prime, because it can be changed into another prime (97813381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48906660 + 48906661.

It is an arithmetic number, because the mean of its divisors is an integer number (48906661).

Almost surely, 2^97813321 is an apocalyptic number.

It is an amenable number.

97813321 is a deficient number, since it is larger than the sum of its proper divisors (1).

97813321 is an equidigital number, since it uses as much as digits as its factorization.

97813321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 34.

The square root of 97813321 is about 9890.0617288266. The cubic root of 97813321 is about 460.7506976719.

The spelling of 97813321 in words is "ninety-seven million, eight hundred thirteen thousand, three hundred twenty-one".