76918000921 has 2 divisors, whose sum is σ = 76918000922. Its totient is φ = 76918000920.

The previous prime is 76918000919. The next prime is 76918000927. The reversal of 76918000921 is 12900081967.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66850688025 + 10067312896 = 258555^2 + 100336^2 .

It is a cyclic number.

It is not a de Polignac number, because 76918000921 - 2¹ = 76918000919 is a prime.

Together with 76918000919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (76918000927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38459000460 + 38459000461.

It is an arithmetic number, because the mean of its divisors is an integer number (38459000461).

Almost surely, 2^76918000921 is an apocalyptic number.

It is an amenable number.

76918000921 is a deficient number, since it is larger than the sum of its proper divisors (1).

76918000921 is an equidigital number, since it uses as much as digits as its factorization.

76918000921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 43.

The spelling of 76918000921 in words is "seventy-six billion, nine hundred eighteen million, nine hundred twenty-one", and thus it is an aban number.