772077989 has 2 divisors, whose sum is σ = 772077990. Its totient is φ = 772077988.

The previous prime is 772077983. The next prime is 772078061. The reversal of 772077989 is 989770277.

772077989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 485453089 + 286624900 = 22033^2 + 16930^2 .

It is a cyclic number.

It is not a de Polignac number, because 772077989 - 2¹⁶ = 772012453 is a prime.

It is a super-2 number, since 2×772077989² = 1192208842196568242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (772077983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 386038994 + 386038995.

It is an arithmetic number, because the mean of its divisors is an integer number (386038995).

Almost surely, 2^772077989 is an apocalyptic number.

It is an amenable number.

772077989 is a deficient number, since it is larger than the sum of its proper divisors (1).

772077989 is an equidigital number, since it uses as much as digits as its factorization.

772077989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3111696, while the sum is 56.

The square root of 772077989 is about 27786.2913862214. The cubic root of 772077989 is about 917.3894127814.

The spelling of 772077989 in words is "seven hundred seventy-two million, seventy-seven thousand, nine hundred eighty-nine".