163579961 has 4 divisors (see below), whose sum is σ = 164663424. Its totient is φ = 162496500.

The previous prime is 163579957. The next prime is 163579991. The reversal of 163579961 is 169975361.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 163579961 - 2² = 163579957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (163579921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 541505 + ... + 541806.

It is an arithmetic number, because the mean of its divisors is an integer number (41165856).

Almost surely, 2^163579961 is an apocalyptic number.

It is an amenable number.

163579961 is a deficient number, since it is larger than the sum of its proper divisors (1083463).

163579961 is a wasteful number, since it uses less digits than its factorization.

163579961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083462.

The product of its digits is 306180, while the sum is 47.

The square root of 163579961 is about 12789.8381928780. The cubic root of 163579961 is about 546.9026571743.

The spelling of 163579961 in words is "one hundred sixty-three million, five hundred seventy-nine thousand, nine hundred sixty-one".