319928249 has 4 divisors (see below), whose sum is σ = 321173364. Its totient is φ = 318683136.

The previous prime is 319928227. The next prime is 319928263. The reversal of 319928249 is 942829913.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 942829913 = 19 ⋅49622627.

It can be written as a sum of positive squares in 2 ways, for example, as 177555625 + 142372624 = 13325^2 + 11932^2 .

It is a cyclic number.

It is not a de Polignac number, because 319928249 - 2²⁴ = 303151033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (319928209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 622172 + ... + 622685.

It is an arithmetic number, because the mean of its divisors is an integer number (80293341).

Almost surely, 2^319928249 is an apocalyptic number.

It is an amenable number.

319928249 is a deficient number, since it is larger than the sum of its proper divisors (1245115).

319928249 is a wasteful number, since it uses less digits than its factorization.

319928249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245114.

The product of its digits is 279936, while the sum is 47.

The square root of 319928249 is about 17886.5382061482. The cubic root of 319928249 is about 683.9392529809.

The spelling of 319928249 in words is "three hundred nineteen million, nine hundred twenty-eight thousand, two hundred forty-nine".