137568329 has 2 divisors, whose sum is σ = 137568330. Its totient is φ = 137568328.

The previous prime is 137568307. The next prime is 137568383. The reversal of 137568329 is 923865731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128777104 + 8791225 = 11348^2 + 2965^2 .

It is a cyclic number.

It is not a de Polignac number, because 137568329 - 2⁸ = 137568073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 137568329.

It is not a weakly prime, because it can be changed into another prime (137568829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68784164 + 68784165.

It is an arithmetic number, because the mean of its divisors is an integer number (68784165).

Almost surely, 2^137568329 is an apocalyptic number.

It is an amenable number.

137568329 is a deficient number, since it is larger than the sum of its proper divisors (1).

137568329 is an equidigital number, since it uses as much as digits as its factorization.

137568329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 44.

The square root of 137568329 is about 11728.9525960335. The cubic root of 137568329 is about 516.2255401372.

The spelling of 137568329 in words is "one hundred thirty-seven million, five hundred sixty-eight thousand, three hundred twenty-nine".