977988966847 has 2 divisors, whose sum is σ = 977988966848. Its totient is φ = 977988966846.

The previous prime is 977988966641. The next prime is 977988966893. The reversal of 977988966847 is 748669889779.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-977988966847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (977988966347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 488994483423 + 488994483424.

It is an arithmetic number, because the mean of its divisors is an integer number (488994483424).

Almost surely, 2^977988966847 is an apocalyptic number.

977988966847 is a deficient number, since it is larger than the sum of its proper divisors (1).

977988966847 is an equidigital number, since it uses as much as digits as its factorization.

977988966847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18435465216, while the sum is 88.

The spelling of 977988966847 in words is "nine hundred seventy-seven billion, nine hundred eighty-eight million, nine hundred sixty-six thousand, eight hundred forty-seven".