97944013 has 2 divisors, whose sum is σ = 97944014. Its totient is φ = 97944012.

The previous prime is 97943999. The next prime is 97944023. The reversal of 97944013 is 31044979.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92198404 + 5745609 = 9602^2 + 2397^2 .

It is a cyclic number.

It is not a de Polignac number, because 97944013 - 2⁹ = 97943501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97944023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48972006 + 48972007.

It is an arithmetic number, because the mean of its divisors is an integer number (48972007).

Almost surely, 2^97944013 is an apocalyptic number.

It is an amenable number.

97944013 is a deficient number, since it is larger than the sum of its proper divisors (1).

97944013 is an equidigital number, since it uses as much as digits as its factorization.

97944013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 97944013 is about 9896.6667620972. Note that the first 3 decimals coincide. The cubic root of 97944013 is about 460.9558150332.

The spelling of 97944013 in words is "ninety-seven million, nine hundred forty-four thousand, thirteen".