319720859 has 2 divisors, whose sum is σ = 319720860. Its totient is φ = 319720858.

The previous prime is 319720799. The next prime is 319720903. The reversal of 319720859 is 958027913.

It is an a-pointer prime, because the next prime (319720903) can be obtained adding 319720859 to its sum of digits (44).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 319720859 - 2⁸ = 319720603 is a prime.

It is not a weakly prime, because it can be changed into another prime (319725859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159860429 + 159860430.

It is an arithmetic number, because the mean of its divisors is an integer number (159860430).

Almost surely, 2^319720859 is an apocalyptic number.

319720859 is a deficient number, since it is larger than the sum of its proper divisors (1).

319720859 is an equidigital number, since it uses as much as digits as its factorization.

319720859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 319720859 is about 17880.7398896131. The cubic root of 319720859 is about 683.7914356475.

The spelling of 319720859 in words is "three hundred nineteen million, seven hundred twenty thousand, eight hundred fifty-nine".