137399813 has 2 divisors, whose sum is σ = 137399814. Its totient is φ = 137399812.

The previous prime is 137399809. The next prime is 137399827. The reversal of 137399813 is 318993731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129436129 + 7963684 = 11377^2 + 2822^2 .

It is a cyclic number.

It is not a de Polignac number, because 137399813 - 2² = 137399809 is a prime.

It is a super-2 number, since 2×137399813² = 37757417224869938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137309813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68699906 + 68699907.

It is an arithmetic number, because the mean of its divisors is an integer number (68699907).

Almost surely, 2^137399813 is an apocalyptic number.

It is an amenable number.

137399813 is a deficient number, since it is larger than the sum of its proper divisors (1).

137399813 is an equidigital number, since it uses as much as digits as its factorization.

137399813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 44.

The square root of 137399813 is about 11721.7666330635. The cubic root of 137399813 is about 516.0146684230.

The spelling of 137399813 in words is "one hundred thirty-seven million, three hundred ninety-nine thousand, eight hundred thirteen".