137403239 has 2 divisors, whose sum is σ = 137403240. Its totient is φ = 137403238.

The previous prime is 137403223. The next prime is 137403241. The reversal of 137403239 is 932304731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 137403239 - 2⁴ = 137403223 is a prime.

It is a super-2 number, since 2×137403239² = 37759300175382242, which contains 22 as substring.

Together with 137403241, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137403209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68701619 + 68701620.

It is an arithmetic number, because the mean of its divisors is an integer number (68701620).

Almost surely, 2^137403239 is an apocalyptic number.

137403239 is a deficient number, since it is larger than the sum of its proper divisors (1).

137403239 is an equidigital number, since it uses as much as digits as its factorization.

137403239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 32.

The square root of 137403239 is about 11721.9127705337. The cubic root of 137403239 is about 516.0189572488.

The spelling of 137403239 in words is "one hundred thirty-seven million, four hundred three thousand, two hundred thirty-nine".