319196921 has 4 divisors (see below), whose sum is σ = 333075072. Its totient is φ = 305318772.

The previous prime is 319196909. The next prime is 319196923. The reversal of 319196921 is 129691913.

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 319196921 - 2¹⁰ = 319195897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (319196923) 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, 6939041 + ... + 6939086.

It is an arithmetic number, because the mean of its divisors is an integer number (83268768).

Almost surely, 2^319196921 is an apocalyptic number.

It is an amenable number.

319196921 is a deficient number, since it is larger than the sum of its proper divisors (13878151).

319196921 is a wasteful number, since it uses less digits than its factorization.

319196921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13878150.

The product of its digits is 26244, while the sum is 41.

The square root of 319196921 is about 17866.0829786498. The cubic root of 319196921 is about 683.4177136067.

The spelling of 319196921 in words is "three hundred nineteen million, one hundred ninety-six thousand, nine hundred twenty-one".