319806643 has 12 divisors (see below), whose sum is σ = 347282760. Its totient is φ = 294368256.

The previous prime is 319806631. The next prime is 319806647. The reversal of 319806643 is 346608913.

It is not a de Polignac number, because 319806643 - 2¹⁷ = 319675571 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 319806596 and 319806605.

It is not an unprimeable number, because it can be changed into a prime (319806647) 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, 61555 + ... + 66547.

It is an arithmetic number, because the mean of its divisors is an integer number (28940230).

Almost surely, 2^319806643 is an apocalyptic number.

319806643 is a deficient number, since it is larger than the sum of its proper divisors (27476117).

319806643 is a wasteful number, since it uses less digits than its factorization.

319806643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5398 (or 5385 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 319806643 is about 17883.1385108990. The cubic root of 319806643 is about 683.8525859890.

The spelling of 319806643 in words is "three hundred nineteen million, eight hundred six thousand, six hundred forty-three".