97178640539 has 2 divisors, whose sum is σ = 97178640540. Its totient is φ = 97178640538.

The previous prime is 97178640499. The next prime is 97178640551. The reversal of 97178640539 is 93504687179.

It is a strong prime.

It is an emirp because it is prime and its reverse (93504687179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97178640539 - 2¹⁶ = 97178575003 is a prime.

It is not a weakly prime, because it can be changed into another prime (97178640589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48589320269 + 48589320270.

It is an arithmetic number, because the mean of its divisors is an integer number (48589320270).

Almost surely, 2^97178640539 is an apocalyptic number.

97178640539 is a deficient number, since it is larger than the sum of its proper divisors (1).

97178640539 is an equidigital number, since it uses as much as digits as its factorization.

97178640539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11430720, while the sum is 59.

The spelling of 97178640539 in words is "ninety-seven billion, one hundred seventy-eight million, six hundred forty thousand, five hundred thirty-nine".