163979111 has 4 divisors (see below), whose sum is σ = 164330712. Its totient is φ = 163627512.

The previous prime is 163979077. The next prime is 163979117. The reversal of 163979111 is 111979361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111979361 = 13 ⋅8613797.

It is a cyclic number.

It is not a de Polignac number, because 163979111 - 2⁶ = 163979047 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 (163979117) 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, 175100 + ... + 176033.

It is an arithmetic number, because the mean of its divisors is an integer number (41082678).

Almost surely, 2^163979111 is an apocalyptic number.

163979111 is a deficient number, since it is larger than the sum of its proper divisors (351601).

163979111 is an equidigital number, since it uses as much as digits as its factorization.

163979111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351600.

The product of its digits is 10206, while the sum is 38.

The square root of 163979111 is about 12805.4328704656. The cubic root of 163979111 is about 547.3471266158.

The spelling of 163979111 in words is "one hundred sixty-three million, nine hundred seventy-nine thousand, one hundred eleven".