319505149 has 4 divisors (see below), whose sum is σ = 320642460. Its totient is φ = 318367840.

The previous prime is 319505141. The next prime is 319505161. The reversal of 319505149 is 941505913.

It is a happy number.

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 132089049 + 187416100 = 11493^2 + 13690^2 .

It is a cyclic number.

It is not a de Polignac number, because 319505149 - 2³ = 319505141 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 (319505141) 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, 568234 + ... + 568795.

It is an arithmetic number, because the mean of its divisors is an integer number (80160615).

Almost surely, 2^319505149 is an apocalyptic number.

It is an amenable number.

319505149 is a deficient number, since it is larger than the sum of its proper divisors (1137311).

319505149 is a wasteful number, since it uses less digits than its factorization.

319505149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137310.

The product of its (nonzero) digits is 24300, while the sum is 37.

The square root of 319505149 is about 17874.7069626330. The cubic root of 319505149 is about 683.6376203939.

The spelling of 319505149 in words is "three hundred nineteen million, five hundred five thousand, one hundred forty-nine".