97591253777 has 2 divisors, whose sum is σ = 97591253778. Its totient is φ = 97591253776.

The previous prime is 97591253743. The next prime is 97591253857. The reversal of 97591253777 is 77735219579.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54973367296 + 42617886481 = 234464^2 + 206441^2 .

It is an emirp because it is prime and its reverse (77735219579) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97591253777 - 2¹⁶ = 97591188241 is a prime.

It is not a weakly prime, because it can be changed into another prime (97591253717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48795626888 + 48795626889.

It is an arithmetic number, because the mean of its divisors is an integer number (48795626889).

Almost surely, 2^97591253777 is an apocalyptic number.

It is an amenable number.

97591253777 is a deficient number, since it is larger than the sum of its proper divisors (1).

97591253777 is an equidigital number, since it uses as much as digits as its factorization.

97591253777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29172150, while the sum is 62.

The spelling of 97591253777 in words is "ninety-seven billion, five hundred ninety-one million, two hundred fifty-three thousand, seven hundred seventy-seven".