76639169 has 2 divisors, whose sum is σ = 76639170. Its totient is φ = 76639168.

The previous prime is 76639163. The next prime is 76639181. The reversal of 76639169 is 96193667.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40157569 + 36481600 = 6337^2 + 6040^2 .

It is a cyclic number.

It is not a de Polignac number, because 76639169 - 2⁴ = 76639153 is a prime.

It is a super-2 number, since 2×76639169² = 11747124450021122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (76639163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38319584 + 38319585.

It is an arithmetic number, because the mean of its divisors is an integer number (38319585).

Almost surely, 2^76639169 is an apocalyptic number.

It is an amenable number.

76639169 is a deficient number, since it is larger than the sum of its proper divisors (1).

76639169 is an equidigital number, since it uses as much as digits as its factorization.

76639169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 47.

The square root of 76639169 is about 8754.3799894681. The cubic root of 76639169 is about 424.7665042665.

The spelling of 76639169 in words is "seventy-six million, six hundred thirty-nine thousand, one hundred sixty-nine".