163919793 has 4 divisors (see below), whose sum is σ = 218559728. Its totient is φ = 109279860.

The previous prime is 163919773. The next prime is 163919801. The reversal of 163919793 is 397919361.

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 not a de Polignac number, because 163919793 - 2²⁴ = 147142577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163919713) 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, 27319963 + ... + 27319968.

It is an arithmetic number, because the mean of its divisors is an integer number (54639932).

Almost surely, 2^163919793 is an apocalyptic number.

It is an amenable number.

163919793 is a deficient number, since it is larger than the sum of its proper divisors (54639935).

163919793 is an equidigital number, since it uses as much as digits as its factorization.

163919793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54639934.

The product of its digits is 275562, while the sum is 48.

The square root of 163919793 is about 12803.1165346567. The cubic root of 163919793 is about 547.2811193210.

The spelling of 163919793 in words is "one hundred sixty-three million, nine hundred nineteen thousand, seven hundred ninety-three".