138573937 has 8 divisors (see below), whose sum is σ = 143776512. Its totient is φ = 133417200.

The previous prime is 138573913. The next prime is 138573943. The reversal of 138573937 is 739375831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138573937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138573997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5239 + ... + 17452.

It is an arithmetic number, because the mean of its divisors is an integer number (17972064).

Almost surely, 2^138573937 is an apocalyptic number.

It is an amenable number.

138573937 is a deficient number, since it is larger than the sum of its proper divisors (5202575).

138573937 is a wasteful number, since it uses less digits than its factorization.

138573937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22919.

The product of its digits is 476280, while the sum is 46.

The square root of 138573937 is about 11771.7431589378. The cubic root of 138573937 is about 517.4803365614.

The spelling of 138573937 in words is "one hundred thirty-eight million, five hundred seventy-three thousand, nine hundred thirty-seven".