7917164491 has 2 divisors, whose sum is σ = 7917164492. Its totient is φ = 7917164490.

The previous prime is 7917164483. The next prime is 7917164501. The reversal of 7917164491 is 1944617197.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7917164491 - 2³ = 7917164483 is a prime.

It is not a weakly prime, because it can be changed into another prime (7917164461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3958582245 + 3958582246.

It is an arithmetic number, because the mean of its divisors is an integer number (3958582246).

Almost surely, 2^7917164491 is an apocalyptic number.

7917164491 is a deficient number, since it is larger than the sum of its proper divisors (1).

7917164491 is an equidigital number, since it uses as much as digits as its factorization.

7917164491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 49.

The square root of 7917164491 is about 88978.4495875265. The cubic root of 7917164491 is about 1993.0730774864.

The spelling of 7917164491 in words is "seven billion, nine hundred seventeen million, one hundred sixty-four thousand, four hundred ninety-one".