97515967139 has 2 divisors, whose sum is σ = 97515967140. Its totient is φ = 97515967138.

The previous prime is 97515967093. The next prime is 97515967187. The reversal of 97515967139 is 93176951579.

It is a weak prime.

It is an emirp because it is prime and its reverse (93176951579) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97515967139 - 2⁸ = 97515966883 is a prime.

It is not a weakly prime, because it can be changed into another prime (97515967739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48757983569 + 48757983570.

It is an arithmetic number, because the mean of its divisors is an integer number (48757983570).

Almost surely, 2^97515967139 is an apocalyptic number.

97515967139 is a deficient number, since it is larger than the sum of its proper divisors (1).

97515967139 is an equidigital number, since it uses as much as digits as its factorization.

97515967139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16074450, while the sum is 62.

The spelling of 97515967139 in words is "ninety-seven billion, five hundred fifteen million, nine hundred sixty-seven thousand, one hundred thirty-nine".