138952437 has 16 divisors (see below), whose sum is σ = 201358080. Its totient is φ = 84722112.

The previous prime is 138952409. The next prime is 138952477. The reversal of 138952437 is 734259831.

138952437 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 138952437 - 2⁸ = 138952181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138952477) 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, 12093 + ... + 20594.

It is an arithmetic number, because the mean of its divisors is an integer number (12584880).

Almost surely, 2^138952437 is an apocalyptic number.

It is an amenable number.

138952437 is a deficient number, since it is larger than the sum of its proper divisors (62405643).

138952437 is a wasteful number, since it uses less digits than its factorization.

138952437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32812.

The product of its digits is 181440, while the sum is 42.

The square root of 138952437 is about 11787.8088294644. The cubic root of 138952437 is about 517.9510557851.

The spelling of 138952437 in words is "one hundred thirty-eight million, nine hundred fifty-two thousand, four hundred thirty-seven".