97943939 has 2 divisors, whose sum is σ = 97943940. Its totient is φ = 97943938.

The previous prime is 97943927. The next prime is 97943977. The reversal of 97943939 is 93934979.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97943939 - 2¹² = 97939843 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (97943999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48971969 + 48971970.

It is an arithmetic number, because the mean of its divisors is an integer number (48971970).

Almost surely, 2^97943939 is an apocalyptic number.

97943939 is a deficient number, since it is larger than the sum of its proper divisors (1).

97943939 is an equidigital number, since it uses as much as digits as its factorization.

97943939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1653372, while the sum is 53.

The square root of 97943939 is about 9896.6630234640. The cubic root of 97943939 is about 460.9556989440.

The spelling of 97943939 in words is "ninety-seven million, nine hundred forty-three thousand, nine hundred thirty-nine".