137975237 has 2 divisors, whose sum is σ = 137975238. Its totient is φ = 137975236.

The previous prime is 137975231. The next prime is 137975239. The reversal of 137975237 is 732579731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131010916 + 6964321 = 11446^2 + 2639^2 .

It is a cyclic number.

It is not a de Polignac number, because 137975237 - 2²⁶ = 70866373 is a prime.

Together with 137975239, 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 (137975231) 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, 68987618 + 68987619.

It is an arithmetic number, because the mean of its divisors is an integer number (68987619).

Almost surely, 2^137975237 is an apocalyptic number.

It is an amenable number.

137975237 is a deficient number, since it is larger than the sum of its proper divisors (1).

137975237 is an equidigital number, since it uses as much as digits as its factorization.

137975237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 277830, while the sum is 44.

The square root of 137975237 is about 11746.2860939107. The cubic root of 137975237 is about 516.7340136051.

The spelling of 137975237 in words is "one hundred thirty-seven million, nine hundred seventy-five thousand, two hundred thirty-seven".