77580089 has 2 divisors, whose sum is σ = 77580090. Its totient is φ = 77580088.

The previous prime is 77580079. The next prime is 77580101. The reversal of 77580089 is 98008577.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50623225 + 26956864 = 7115^2 + 5192^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77580089 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (77580049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38790044 + 38790045.

It is an arithmetic number, because the mean of its divisors is an integer number (38790045).

Almost surely, 2^77580089 is an apocalyptic number.

It is an amenable number.

77580089 is a deficient number, since it is larger than the sum of its proper divisors (1).

77580089 is an equidigital number, since it uses as much as digits as its factorization.

77580089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 44.

The square root of 77580089 is about 8807.9560057939. The cubic root of 77580089 is about 426.4977632100.

The spelling of 77580089 in words is "seventy-seven million, five hundred eighty thousand, eighty-nine".