97668539 has 2 divisors, whose sum is σ = 97668540. Its totient is φ = 97668538.

The previous prime is 97668517. The next prime is 97668547. The reversal of 97668539 is 93586679.

It is a strong prime.

It is an emirp because it is prime and its reverse (93586679) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97668539 - 2²⁴ = 80891323 is a prime.

It is not a weakly prime, because it can be changed into another prime (97668509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48834269 + 48834270.

It is an arithmetic number, because the mean of its divisors is an integer number (48834270).

Almost surely, 2^97668539 is an apocalyptic number.

97668539 is a deficient number, since it is larger than the sum of its proper divisors (1).

97668539 is an equidigital number, since it uses as much as digits as its factorization.

97668539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 53.

The square root of 97668539 is about 9882.7394481490. The cubic root of 97668539 is about 460.5232530268.

The spelling of 97668539 in words is "ninety-seven million, six hundred sixty-eight thousand, five hundred thirty-nine".