76399121 has 2 divisors, whose sum is σ = 76399122. Its totient is φ = 76399120.

The previous prime is 76399051. The next prime is 76399153. The reversal of 76399121 is 12199367.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39627025 + 36772096 = 6295^2 + 6064^2 .

It is a cyclic number.

It is not a de Polignac number, because 76399121 - 2²² = 72204817 is a prime.

It is not a weakly prime, because it can be changed into another prime (76399181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38199560 + 38199561.

It is an arithmetic number, because the mean of its divisors is an integer number (38199561).

Almost surely, 2^76399121 is an apocalyptic number.

It is an amenable number.

76399121 is a deficient number, since it is larger than the sum of its proper divisors (1).

76399121 is an equidigital number, since it uses as much as digits as its factorization.

76399121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20412, while the sum is 38.

The square root of 76399121 is about 8740.6590712600. The cubic root of 76399121 is about 424.3225581146.

The spelling of 76399121 in words is "seventy-six million, three hundred ninety-nine thousand, one hundred twenty-one".