138748489 has 16 divisors (see below), whose sum is σ = 158469120. Its totient is φ = 120249360.

The previous prime is 138748481. The next prime is 138748501. The reversal of 138748489 is 984847831.

It is not a de Polignac number, because 138748489 - 2³ = 138748481 is a prime.

It is a super-2 number, since 2×138748489² = 38502286399566242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138748481) 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, 95164 + ... + 96610.

It is an arithmetic number, because the mean of its divisors is an integer number (9904320).

Almost surely, 2^138748489 is an apocalyptic number.

It is an amenable number.

138748489 is a deficient number, since it is larger than the sum of its proper divisors (19720631).

138748489 is a wasteful number, since it uses less digits than its factorization.

138748489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860.

The product of its digits is 1548288, while the sum is 52.

The square root of 138748489 is about 11779.1548508371. The cubic root of 138748489 is about 517.6975234530.

The spelling of 138748489 in words is "one hundred thirty-eight million, seven hundred forty-eight thousand, four hundred eighty-nine".