163664833 has 2 divisors, whose sum is σ = 163664834. Its totient is φ = 163664832.

The previous prime is 163664791. The next prime is 163664861. The reversal of 163664833 is 338466361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103571329 + 60093504 = 10177^2 + 7752^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163664833 is a prime.

It is not a weakly prime, because it can be changed into another prime (163668833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81832416 + 81832417.

It is an arithmetic number, because the mean of its divisors is an integer number (81832417).

Almost surely, 2^163664833 is an apocalyptic number.

It is an amenable number.

163664833 is a deficient number, since it is larger than the sum of its proper divisors (1).

163664833 is an equidigital number, since it uses as much as digits as its factorization.

163664833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 40.

The square root of 163664833 is about 12793.1557092064. The cubic root of 163664833 is about 546.9972260052.

The spelling of 163664833 in words is "one hundred sixty-three million, six hundred sixty-four thousand, eight hundred thirty-three".