972577789 has 2 divisors, whose sum is σ = 972577790. Its totient is φ = 972577788.

The previous prime is 972577777. The next prime is 972577799. The reversal of 972577789 is 987775279.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 933302500 + 39275289 = 30550^2 + 6267^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-972577789 is a prime.

It is a super-2 number, since 2×972577789² = 1891815111312257042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (972577799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486288894 + 486288895.

It is an arithmetic number, because the mean of its divisors is an integer number (486288895).

Almost surely, 2^972577789 is an apocalyptic number.

It is an amenable number.

972577789 is a deficient number, since it is larger than the sum of its proper divisors (1).

972577789 is an equidigital number, since it uses as much as digits as its factorization.

972577789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15558480, while the sum is 61.

The square root of 972577789 is about 31186.1794550086. The cubic root of 972577789 is about 990.7744132841.

The spelling of 972577789 in words is "nine hundred seventy-two million, five hundred seventy-seven thousand, seven hundred eighty-nine".