319191923 has 4 divisors (see below), whose sum is σ = 319257480. Its totient is φ = 319126368.

The previous prime is 319191919. The next prime is 319191937. The reversal of 319191923 is 329191913.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 319191923 - 2² = 319191919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (319191913) 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, 24833 + ... + 35426.

It is an arithmetic number, because the mean of its divisors is an integer number (79814370).

Almost surely, 2^319191923 is an apocalyptic number.

319191923 is a deficient number, since it is larger than the sum of its proper divisors (65557).

319191923 is an equidigital number, since it uses as much as digits as its factorization.

319191923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65556.

The product of its digits is 13122, while the sum is 38.

The square root of 319191923 is about 17865.9431041297. The cubic root of 319191923 is about 683.4141465928.

The spelling of 319191923 in words is "three hundred nineteen million, one hundred ninety-one thousand, nine hundred twenty-three".