76297975921 has 2 divisors, whose sum is σ = 76297975922. Its totient is φ = 76297975920.

The previous prime is 76297975891. The next prime is 76297975937. The reversal of 76297975921 is 12957979267.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71950551696 + 4347424225 = 268236^2 + 65935^2 .

It is an emirp because it is prime and its reverse (12957979267) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76297975921 - 2⁵ = 76297975889 is a prime.

It is a super-2 number, since 2×76297975921² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (76297975421) 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, 38148987960 + 38148987961.

It is an arithmetic number, because the mean of its divisors is an integer number (38148987961).

Almost surely, 2^76297975921 is an apocalyptic number.

It is an amenable number.

76297975921 is a deficient number, since it is larger than the sum of its proper divisors (1).

76297975921 is an equidigital number, since it uses as much as digits as its factorization.

76297975921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30005640, while the sum is 64.

The spelling of 76297975921 in words is "seventy-six billion, two hundred ninety-seven million, nine hundred seventy-five thousand, nine hundred twenty-one".