2161579967 has 2 divisors, whose sum is σ = 2161579968. Its totient is φ = 2161579966.

The previous prime is 2161579933. The next prime is 2161579993. The reversal of 2161579967 is 7699751612.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2161579967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2161578967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080789983 + 1080789984.

It is an arithmetic number, because the mean of its divisors is an integer number (1080789984).

Almost surely, 2^2161579967 is an apocalyptic number.

2161579967 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161579967 is an equidigital number, since it uses as much as digits as its factorization.

2161579967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1428840, while the sum is 53.

The square root of 2161579967 is about 46492.7947858590. The cubic root of 2161579967 is about 1292.9759164355.

The spelling of 2161579967 in words is "two billion, one hundred sixty-one million, five hundred seventy-nine thousand, nine hundred sixty-seven".