320344137 has 12 divisors (see below), whose sum is σ = 471450564. Its totient is φ = 209532960.

The previous prime is 320344127. The next prime is 320344153. The reversal of 320344137 is 731443023.

It can be written as a sum of positive squares in 2 ways, for example, as 181198521 + 139145616 = 13461^2 + 11796^2 .

It is not a de Polignac number, because 320344137 - 2¹⁹ = 319819849 is a prime.

It is a super-2 number, since 2×320344137² = 205240732220549538, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 320344137.

It is not an unprimeable number, because it can be changed into a prime (320344127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 335314 + ... + 336267.

It is an arithmetic number, because the mean of its divisors is an integer number (39287547).

Almost surely, 2^320344137 is an apocalyptic number.

It is an amenable number.

320344137 is a deficient number, since it is larger than the sum of its proper divisors (151106427).

320344137 is a wasteful number, since it uses less digits than its factorization.

320344137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671640 (or 671637 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 27.

The square root of 320344137 is about 17898.1601568429. The cubic root of 320344137 is about 684.2354849904.

The spelling of 320344137 in words is "three hundred twenty million, three hundred forty-four thousand, one hundred thirty-seven".