319442643 has 16 divisors (see below), whose sum is σ = 509652640. Its totient is φ = 196579872.

The previous prime is 319442621. The next prime is 319442689. The reversal of 319442643 is 346244913.

It is a happy number.

319442643 is a `hidden beast` number, since 3 + 1 + 9 + 4 + 4 + 2 + 643 = 666.

It is not a de Polignac number, because 319442643 - 2¹² = 319438547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 319442598 and 319442607.

It is not an unprimeable number, because it can be changed into a prime (319442843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 454696 + ... + 455397.

It is an arithmetic number, because the mean of its divisors is an integer number (31853290).

Almost surely, 2^319442643 is an apocalyptic number.

319442643 is a deficient number, since it is larger than the sum of its proper divisors (190209997).

319442643 is a wasteful number, since it uses less digits than its factorization.

319442643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910115 (or 910109 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 319442643 is about 17872.9584288668. The cubic root of 319442643 is about 683.5930366158.

The spelling of 319442643 in words is "three hundred nineteen million, four hundred forty-two thousand, six hundred forty-three".