138501237 has 16 divisors (see below), whose sum is σ = 215959040. Its totient is φ = 77302512.

The previous prime is 138501229. The next prime is 138501257. The reversal of 138501237 is 732105831.

It is not a de Polignac number, because 138501237 - 2³ = 138501229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138501257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75787 + ... + 77592.

It is an arithmetic number, because the mean of its divisors is an integer number (13497440).

Almost surely, 2^138501237 is an apocalyptic number.

It is an amenable number.

138501237 is a deficient number, since it is larger than the sum of its proper divisors (77457803).

138501237 is a wasteful number, since it uses less digits than its factorization.

138501237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153432.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 138501237 is about 11768.6548509165. The cubic root of 138501237 is about 517.3898255504.

The spelling of 138501237 in words is "one hundred thirty-eight million, five hundred one thousand, two hundred thirty-seven".