138983889 has 8 divisors (see below), whose sum is σ = 202158432. Its totient is φ = 84232640.

The previous prime is 138983837. The next prime is 138983893. The reversal of 138983889 is 988389831.

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 138983889 - 2¹² = 138979793 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (138983899) 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, 2105784 + ... + 2105849.

It is an arithmetic number, because the mean of its divisors is an integer number (25269804).

Almost surely, 2^138983889 is an apocalyptic number.

It is an amenable number.

138983889 is a deficient number, since it is larger than the sum of its proper divisors (63174543).

138983889 is a wasteful number, since it uses less digits than its factorization.

138983889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4211647.

The product of its digits is 2985984, while the sum is 57.

The square root of 138983889 is about 11789.1428441596. The cubic root of 138983889 is about 517.9901323881.

The spelling of 138983889 in words is "one hundred thirty-eight million, nine hundred eighty-three thousand, eight hundred eighty-nine".