319209493 has 4 divisors (see below), whose sum is σ = 337986540. Its totient is φ = 300432448.

The previous prime is 319209487. The next prime is 319209503. The reversal of 319209493 is 394902913.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 202720644 + 116488849 = 14238^2 + 10793^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-319209493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (319209413) 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, 9388498 + ... + 9388531.

It is an arithmetic number, because the mean of its divisors is an integer number (84496635).

Almost surely, 2^319209493 is an apocalyptic number.

It is an amenable number.

319209493 is a deficient number, since it is larger than the sum of its proper divisors (18777047).

319209493 is a wasteful number, since it uses less digits than its factorization.

319209493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18777046.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 319209493 is about 17866.4348150379. The cubic root of 319209493 is about 683.4266859308.

The spelling of 319209493 in words is "three hundred nineteen million, two hundred nine thousand, four hundred ninety-three".