163879081 has 2 divisors, whose sum is σ = 163879082. Its totient is φ = 163879080.

The previous prime is 163879069. The next prime is 163879129. The reversal of 163879081 is 180978361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122855056 + 41024025 = 11084^2 + 6405^2 .

It is a cyclic number.

It is not a de Polignac number, because 163879081 - 2⁹ = 163878569 is a prime.

It is a super-2 number, since 2×163879081² = 53712706378809122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (163879061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81939540 + 81939541.

It is an arithmetic number, because the mean of its divisors is an integer number (81939541).

Almost surely, 2^163879081 is an apocalyptic number.

It is an amenable number.

163879081 is a deficient number, since it is larger than the sum of its proper divisors (1).

163879081 is an equidigital number, since it uses as much as digits as its factorization.

163879081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 163879081 is about 12801.5265105377. The cubic root of 163879081 is about 547.2358070102.

The spelling of 163879081 in words is "one hundred sixty-three million, eight hundred seventy-nine thousand, eighty-one".