977639461 has 2 divisors, whose sum is σ = 977639462. Its totient is φ = 977639460.

The previous prime is 977639413. The next prime is 977639513. The reversal of 977639461 is 164936779.

It is an a-pointer prime, because the next prime (977639513) can be obtained adding 977639461 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 861129025 + 116510436 = 29345^2 + 10794^2 .

It is a cyclic number.

It is not a de Polignac number, because 977639461 - 2¹¹ = 977637413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 977639399 and 977639408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (977639401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 488819730 + 488819731.

It is an arithmetic number, because the mean of its divisors is an integer number (488819731).

Almost surely, 2^977639461 is an apocalyptic number.

It is an amenable number.

977639461 is a deficient number, since it is larger than the sum of its proper divisors (1).

977639461 is an equidigital number, since it uses as much as digits as its factorization.

977639461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1714608, while the sum is 52.

The square root of 977639461 is about 31267.2266278927. The cubic root of 977639461 is about 992.4902315531.

The spelling of 977639461 in words is "nine hundred seventy-seven million, six hundred thirty-nine thousand, four hundred sixty-one".