77200889 has 2 divisors, whose sum is σ = 77200890. Its totient is φ = 77200888.

The previous prime is 77200853. The next prime is 77200897. The reversal of 77200889 is 98800277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50523664 + 26677225 = 7108^2 + 5165^2 .

It is a cyclic number.

It is not a de Polignac number, because 77200889 - 2²⁴ = 60423673 is a prime.

It is not a weakly prime, because it can be changed into another prime (77202889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38600444 + 38600445.

It is an arithmetic number, because the mean of its divisors is an integer number (38600445).

Almost surely, 2^77200889 is an apocalyptic number.

It is an amenable number.

77200889 is a deficient number, since it is larger than the sum of its proper divisors (1).

77200889 is an equidigital number, since it uses as much as digits as its factorization.

77200889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 41.

The square root of 77200889 is about 8786.4036442677. The cubic root of 77200889 is about 425.8017419648.

The spelling of 77200889 in words is "seventy-seven million, two hundred thousand, eight hundred eighty-nine".