977977343989 has 2 divisors, whose sum is σ = 977977343990. Its totient is φ = 977977343988.

The previous prime is 977977343947. The next prime is 977977344017. The reversal of 977977343989 is 989343779779.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 885960975025 + 92016368964 = 941255^2 + 303342^2 .

It is a cyclic number.

It is not a de Polignac number, because 977977343989 - 2¹⁵ = 977977311221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (977977343929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 488988671994 + 488988671995.

It is an arithmetic number, because the mean of its divisors is an integer number (488988671995).

Almost surely, 2^977977343989 is an apocalyptic number.

It is an amenable number.

977977343989 is a deficient number, since it is larger than the sum of its proper divisors (1).

977977343989 is an equidigital number, since it uses as much as digits as its factorization.

977977343989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536852768, while the sum is 82.

The spelling of 977977343989 in words is "nine hundred seventy-seven billion, nine hundred seventy-seven million, three hundred forty-three thousand, nine hundred eighty-nine".