319406749 has 2 divisors, whose sum is σ = 319406750. Its totient is φ = 319406748.

The previous prime is 319406719. The next prime is 319406753. The reversal of 319406749 is 947604913.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 272580100 + 46826649 = 16510^2 + 6843^2 .

It is a cyclic number.

It is not a de Polignac number, because 319406749 - 2²⁵ = 285852317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (319406719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159703374 + 159703375.

It is an arithmetic number, because the mean of its divisors is an integer number (159703375).

Almost surely, 2^319406749 is an apocalyptic number.

It is an amenable number.

319406749 is a deficient number, since it is larger than the sum of its proper divisors (1).

319406749 is an equidigital number, since it uses as much as digits as its factorization.

319406749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 319406749 is about 17871.9542579988. The cubic root of 319406749 is about 683.5674318027.

The spelling of 319406749 in words is "three hundred nineteen million, four hundred six thousand, seven hundred forty-nine".