138043873 has 12 divisors (see below), whose sum is σ = 158941008. Its totient is φ = 118886040.

The previous prime is 138043847. The next prime is 138043897. The reversal of 138043873 is 378340831.

It is a de Polignac number, because none of the positive numbers 2^k-138043873 is a prime.

It is a super-2 number, since 2×138043873² = 38112221745680258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138047873) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13411 + ... + 21352.

It is an arithmetic number, because the mean of its divisors is an integer number (13245084).

Almost surely, 2^138043873 is an apocalyptic number.

It is an amenable number.

138043873 is a deficient number, since it is larger than the sum of its proper divisors (20897135).

138043873 is a wasteful number, since it uses less digits than its factorization.

138043873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34812 (or 34793 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 138043873 is about 11749.2073349652. The cubic root of 138043873 is about 516.8196827855.

The spelling of 138043873 in words is "one hundred thirty-eight million, forty-three thousand, eight hundred seventy-three".