138250957 has 12 divisors (see below), whose sum is σ = 150522624. Its totient is φ = 126918480.

The previous prime is 138250933. The next prime is 138250963. The reversal of 138250957 is 759052831.

138250957 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138250957 - 2¹⁹ = 137726669 is a prime.

It is a super-2 number, since 2×138250957² = 38226654222831698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138250967) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30138 + ... + 34420.

It is an arithmetic number, because the mean of its divisors is an integer number (12543552).

Almost surely, 2^138250957 is an apocalyptic number.

It is an amenable number.

138250957 is a deficient number, since it is larger than the sum of its proper divisors (12271667).

138250957 is a wasteful number, since it uses less digits than its factorization.

138250957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4500 (or 4487 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 138250957 is about 11758.0167120140. The cubic root of 138250957 is about 517.0779862079.

The spelling of 138250957 in words is "one hundred thirty-eight million, two hundred fifty thousand, nine hundred fifty-seven".