9977663291 has 2 divisors, whose sum is σ = 9977663292. Its totient is φ = 9977663290.

The previous prime is 9977663279. The next prime is 9977663321. The reversal of 9977663291 is 1923667799.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9977663291 - 2¹⁰ = 9977662267 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9977663291.

It is not a weakly prime, because it can be changed into another prime (9977663231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4988831645 + 4988831646.

It is an arithmetic number, because the mean of its divisors is an integer number (4988831646).

Almost surely, 2^9977663291 is an apocalyptic number.

9977663291 is a deficient number, since it is larger than the sum of its proper divisors (1).

9977663291 is an equidigital number, since it uses as much as digits as its factorization.

9977663291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7715736, while the sum is 59.

The square root of 9977663291 is about 99888.2540191789. The cubic root of 9977663291 is about 2152.8293948465.

The spelling of 9977663291 in words is "nine billion, nine hundred seventy-seven million, six hundred sixty-three thousand, two hundred ninety-one".