76718009 has 2 divisors, whose sum is σ = 76718010. Its totient is φ = 76718008.

The previous prime is 76717999. The next prime is 76718023. The reversal of 76718009 is 90081767.

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., 45859984 + 30858025 = 6772^2 + 5555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76718009 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (76718039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38359004 + 38359005.

It is an arithmetic number, because the mean of its divisors is an integer number (38359005).

Almost surely, 2^76718009 is an apocalyptic number.

It is an amenable number.

76718009 is a deficient number, since it is larger than the sum of its proper divisors (1).

76718009 is an equidigital number, since it uses as much as digits as its factorization.

76718009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 76718009 is about 8758.8817208591. The cubic root of 76718009 is about 424.9121091609.

The spelling of 76718009 in words is "seventy-six million, seven hundred eighteen thousand, nine".