138993373 has 4 divisors (see below), whose sum is σ = 139041760. Its totient is φ = 138944988.

The previous prime is 138993353. The next prime is 138993383. The reversal of 138993373 is 373399831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 138993373 - 2¹³ = 138985181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138993313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19593 + ... + 25726.

It is an arithmetic number, because the mean of its divisors is an integer number (34760440).

Almost surely, 2^138993373 is an apocalyptic number.

It is an amenable number.

138993373 is a deficient number, since it is larger than the sum of its proper divisors (48387).

138993373 is an equidigital number, since it uses as much as digits as its factorization.

138993373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48386.

The product of its digits is 367416, while the sum is 46.

The square root of 138993373 is about 11789.5450717998. The cubic root of 138993373 is about 518.0019143452.

The spelling of 138993373 in words is "one hundred thirty-eight million, nine hundred ninety-three thousand, three hundred seventy-three".