138800923 has 4 divisors (see below), whose sum is σ = 139381920. Its totient is φ = 138219928.

The previous prime is 138800911. The next prime is 138800933. The reversal of 138800923 is 329008831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 329008831 = 3041 ⋅108191.

It is a cyclic number.

It is not a de Polignac number, because 138800923 - 2⁵ = 138800891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138800933) 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, 290140 + ... + 290617.

It is an arithmetic number, because the mean of its divisors is an integer number (34845480).

Almost surely, 2^138800923 is an apocalyptic number.

138800923 is a deficient number, since it is larger than the sum of its proper divisors (580997).

138800923 is an equidigital number, since it uses as much as digits as its factorization.

138800923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580996.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 138800923 is about 11781.3803520640. The cubic root of 138800923 is about 517.7627290478.

The spelling of 138800923 in words is "one hundred thirty-eight million, eight hundred thousand, nine hundred twenty-three".