163804957 has 6 divisors (see below), whose sum is σ = 168353178. Its totient is φ = 159376464.

The previous prime is 163804943. The next prime is 163804973. The reversal of 163804957 is 759408361.

It can be written as a sum of positive squares in 3 ways, for example, as 117917881 + 45887076 = 10859^2 + 6774^2 .

It is not a de Polignac number, because 163804957 - 2⁷ = 163804829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163804987) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58458 + ... + 61195.

It is an arithmetic number, because the mean of its divisors is an integer number (28058863).

Almost surely, 2^163804957 is an apocalyptic number.

It is an amenable number.

163804957 is a deficient number, since it is larger than the sum of its proper divisors (4548221).

163804957 is an equidigital number, since it uses as much as digits as its factorization.

163804957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119727 (or 119690 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 163804957 is about 12798.6310596095. The cubic root of 163804957 is about 547.1532879888.

The spelling of 163804957 in words is "one hundred sixty-three million, eight hundred four thousand, nine hundred fifty-seven".