319406939 has 2 divisors, whose sum is σ = 319406940. Its totient is φ = 319406938.

The previous prime is 319406873. The next prime is 319406963. The reversal of 319406939 is 939604913.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 319406939 - 2⁸ = 319406683 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 319406939.

It is not a weakly prime, because it can be changed into another prime (319406639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159703469 + 159703470.

It is an arithmetic number, because the mean of its divisors is an integer number (159703470).

Almost surely, 2^319406939 is an apocalyptic number.

319406939 is a deficient number, since it is larger than the sum of its proper divisors (1).

319406939 is an equidigital number, since it uses as much as digits as its factorization.

319406939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 157464, while the sum is 44.

The square root of 319406939 is about 17871.9595735890. The cubic root of 319406939 is about 683.5675673433.

The spelling of 319406939 in words is "three hundred nineteen million, four hundred six thousand, nine hundred thirty-nine".