76165021 has 2 divisors, whose sum is σ = 76165022. Its totient is φ = 76165020.

The previous prime is 76165007. The next prime is 76165031. The reversal of 76165021 is 12056167.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65367225 + 10797796 = 8085^2 + 3286^2 .

It is an emirp because it is prime and its reverse (12056167) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76165021 - 2⁵ = 76164989 is a prime.

It is a super-2 number, since 2×76165021² = 11602220847860882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76165031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38082510 + 38082511.

It is an arithmetic number, because the mean of its divisors is an integer number (38082511).

Almost surely, 2^76165021 is an apocalyptic number.

It is an amenable number.

76165021 is a deficient number, since it is larger than the sum of its proper divisors (1).

76165021 is an equidigital number, since it uses as much as digits as its factorization.

76165021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 76165021 is about 8727.2573584145. The cubic root of 76165021 is about 423.8887156771. Note that the first 3 decimals are identical.

The spelling of 76165021 in words is "seventy-six million, one hundred sixty-five thousand, twenty-one".