138926837 has 8 divisors (see below), whose sum is σ = 158923200. Its totient is φ = 118967904.

The previous prime is 138926807. The next prime is 138926867. The reversal of 138926837 is 738629831.

It is an interprime number because it is at equal distance from previous prime (138926807) and next prime (138926867).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138926837 - 2⁶ = 138926773 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138926791 and 138926800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138926807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 887 + ... + 16692.

It is an arithmetic number, because the mean of its divisors is an integer number (19865400).

Almost surely, 2^138926837 is an apocalyptic number.

It is an amenable number.

138926837 is a deficient number, since it is larger than the sum of its proper divisors (19996363).

138926837 is a wasteful number, since it uses less digits than its factorization.

138926837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18715.

The product of its digits is 435456, while the sum is 47.

The square root of 138926837 is about 11786.7229118190. The cubic root of 138926837 is about 517.9192454724.

The spelling of 138926837 in words is "one hundred thirty-eight million, nine hundred twenty-six thousand, eight hundred thirty-seven".