138387837 has 16 divisors (see below), whose sum is σ = 223281792. Its totient is φ = 74426880.

The previous prime is 138387829. The next prime is 138387853. The reversal of 138387837 is 738783831.

It is not a de Polignac number, because 138387837 - 2³ = 138387829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138387827) 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, 193464 + ... + 194177.

It is an arithmetic number, because the mean of its divisors is an integer number (13955112).

Almost surely, 2^138387837 is an apocalyptic number.

138387837 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

138387837 is a deficient number, since it is larger than the sum of its proper divisors (84893955).

138387837 is a wasteful number, since it uses less digits than its factorization.

138387837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387668.

The product of its digits is 677376, while the sum is 48.

The square root of 138387837 is about 11763.8359815156. The cubic root of 138387837 is about 517.2485800578.

The spelling of 138387837 in words is "one hundred thirty-eight million, three hundred eighty-seven thousand, eight hundred thirty-seven".