97786864739 has 2 divisors, whose sum is σ = 97786864740. Its totient is φ = 97786864738.

The previous prime is 97786864717. The next prime is 97786864757. The reversal of 97786864739 is 93746868779.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97786864739 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (97786864139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48893432369 + 48893432370.

It is an arithmetic number, because the mean of its divisors is an integer number (48893432370).

Almost surely, 2^97786864739 is an apocalyptic number.

97786864739 is a deficient number, since it is larger than the sum of its proper divisors (1).

97786864739 is an equidigital number, since it uses as much as digits as its factorization.

97786864739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768144384, while the sum is 74.

The spelling of 97786864739 in words is "ninety-seven billion, seven hundred eighty-six million, eight hundred sixty-four thousand, seven hundred thirty-nine".