138819373 has 16 divisors (see below), whose sum is σ = 173998080. Its totient is φ = 107593200.

The previous prime is 138819371. The next prime is 138819391. The reversal of 138819373 is 373918831.

It is not a de Polignac number, because 138819373 - 2¹ = 138819371 is a prime.

It is a super-2 number, since 2×138819373² = 38541636640226258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138819371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9988 + ... + 19426.

It is an arithmetic number, because the mean of its divisors is an integer number (10874880).

Almost surely, 2^138819373 is an apocalyptic number.

It is an amenable number.

138819373 is a deficient number, since it is larger than the sum of its proper divisors (35178707).

138819373 is a wasteful number, since it uses less digits than its factorization.

138819373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9648.

The product of its digits is 108864, while the sum is 43.

The square root of 138819373 is about 11782.1633412544. The cubic root of 138819373 is about 517.7856690948.

The spelling of 138819373 in words is "one hundred thirty-eight million, eight hundred nineteen thousand, three hundred seventy-three".