319655421 has 12 divisors (see below), whose sum is σ = 472462848. Its totient is φ = 208147464.

The previous prime is 319655389. The next prime is 319655423. The reversal of 319655421 is 124556913.

It is not a de Polignac number, because 319655421 - 2⁵ = 319655389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (319655423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 412605 + ... + 413378.

It is an arithmetic number, because the mean of its divisors is an integer number (39371904).

Almost surely, 2^319655421 is an apocalyptic number.

It is an amenable number.

319655421 is a deficient number, since it is larger than the sum of its proper divisors (152807427).

319655421 is a wasteful number, since it uses less digits than its factorization.

319655421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826032 (or 826029 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 319655421 is about 17878.9099499942. The cubic root of 319655421 is about 683.7447814117.

The spelling of 319655421 in words is "three hundred nineteen million, six hundred fifty-five thousand, four hundred twenty-one".