97665539 has 2 divisors, whose sum is σ = 97665540. Its totient is φ = 97665538.

The previous prime is 97665511. The next prime is 97665551. The reversal of 97665539 is 93556679.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 97665539 - 2¹⁶ = 97600003 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (97665739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48832769 + 48832770.

It is an arithmetic number, because the mean of its divisors is an integer number (48832770).

Almost surely, 2^97665539 is an apocalyptic number.

97665539 is a deficient number, since it is larger than the sum of its proper divisors (1).

97665539 is an equidigital number, since it uses as much as digits as its factorization.

97665539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1530900, while the sum is 50.

The square root of 97665539 is about 9882.5876672054. The cubic root of 97665539 is about 460.5185378137.

The spelling of 97665539 in words is "ninety-seven million, six hundred sixty-five thousand, five hundred thirty-nine".