97308581 has 2 divisors, whose sum is σ = 97308582. Its totient is φ = 97308580.

The previous prime is 97308569. The next prime is 97308587. The reversal of 97308581 is 18580379.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67387681 + 29920900 = 8209^2 + 5470^2 .

It is a cyclic number.

It is not a de Polignac number, because 97308581 - 2¹⁴ = 97292197 is a prime.

It is a super-2 number, since 2×97308581² = 18937919872467122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97308587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48654290 + 48654291.

It is an arithmetic number, because the mean of its divisors is an integer number (48654291).

Almost surely, 2^97308581 is an apocalyptic number.

It is an amenable number.

97308581 is a deficient number, since it is larger than the sum of its proper divisors (1).

97308581 is an equidigital number, since it uses as much as digits as its factorization.

97308581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 97308581 is about 9864.5111891061. The cubic root of 97308581 is about 459.9568028119.

The spelling of 97308581 in words is "ninety-seven million, three hundred eight thousand, five hundred eighty-one".