976664789 has 2 divisors, whose sum is σ = 976664790. Its totient is φ = 976664788.

The previous prime is 976664783. The next prime is 976664831. The reversal of 976664789 is 987466679.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 935319889 + 41344900 = 30583^2 + 6430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-976664789 is a prime.

It is a super-2 number, since 2×976664789² = 1907748220144829042, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (976664783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 488332394 + 488332395.

It is an arithmetic number, because the mean of its divisors is an integer number (488332395).

Almost surely, 2^976664789 is an apocalyptic number.

It is an amenable number.

976664789 is a deficient number, since it is larger than the sum of its proper divisors (1).

976664789 is an equidigital number, since it uses as much as digits as its factorization.

976664789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27433728, while the sum is 62.

The square root of 976664789 is about 31251.6365811456. The cubic root of 976664789 is about 992.1602959862.

The spelling of 976664789 in words is "nine hundred seventy-six million, six hundred sixty-four thousand, seven hundred eighty-nine".