137605231 has 2 divisors, whose sum is σ = 137605232. Its totient is φ = 137605230.

The previous prime is 137605177. The next prime is 137605271. The reversal of 137605231 is 132506731.

137605231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 137605231 - 2²³ = 129216623 is a prime.

It is a super-2 number, since 2×137605231² = 37870399197126722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 137605231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137605271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68802615 + 68802616.

It is an arithmetic number, because the mean of its divisors is an integer number (68802616).

Almost surely, 2^137605231 is an apocalyptic number.

137605231 is a deficient number, since it is larger than the sum of its proper divisors (1).

137605231 is an equidigital number, since it uses as much as digits as its factorization.

137605231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 137605231 is about 11730.5256062974. The cubic root of 137605231 is about 516.2716942967.

The spelling of 137605231 in words is "one hundred thirty-seven million, six hundred five thousand, two hundred thirty-one".