138901389 has 16 divisors (see below), whose sum is σ = 202497024. Its totient is φ = 83991600.

The previous prime is 138901369. The next prime is 138901409. The reversal of 138901389 is 983109831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (138901369) and next prime (138901409).

It is not a de Polignac number, because 138901389 - 2⁹ = 138900877 is a prime.

It is a super-2 number, since 2×138901389² = 38587191732258642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 138901389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138901369) 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, 10734 + ... + 19824.

It is an arithmetic number, because the mean of its divisors is an integer number (12656064).

Almost surely, 2^138901389 is an apocalyptic number.

It is an amenable number.

138901389 is a deficient number, since it is larger than the sum of its proper divisors (63595635).

138901389 is a wasteful number, since it uses less digits than its factorization.

138901389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9568.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 138901389 is about 11785.6433426436. The cubic root of 138901389 is about 517.8876201602.

The spelling of 138901389 in words is "one hundred thirty-eight million, nine hundred one thousand, three hundred eighty-nine".