76644089 has 2 divisors, whose sum is σ = 76644090. Its totient is φ = 76644088.

The previous prime is 76644083. The next prime is 76644091. The reversal of 76644089 is 98044667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65885689 + 10758400 = 8117^2 + 3280^2 .

It is a cyclic number.

It is not a de Polignac number, because 76644089 - 2¹² = 76639993 is a prime.

Together with 76644091, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (76644083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38322044 + 38322045.

It is an arithmetic number, because the mean of its divisors is an integer number (38322045).

Almost surely, 2^76644089 is an apocalyptic number.

It is an amenable number.

76644089 is a deficient number, since it is larger than the sum of its proper divisors (1).

76644089 is an equidigital number, since it uses as much as digits as its factorization.

76644089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 76644089 is about 8754.6609871542. The cubic root of 76644089 is about 424.7755936417.

The spelling of 76644089 in words is "seventy-six million, six hundred forty-four thousand, eighty-nine".