138823707 has 8 divisors (see below), whose sum is σ = 201925440. Its totient is φ = 84135560.

The previous prime is 138823691. The next prime is 138823721. The reversal of 138823707 is 707328831.

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

It is a cyclic number.

It is not a de Polignac number, because 138823707 - 2⁴ = 138823691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138823757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2103357 + ... + 2103422.

It is an arithmetic number, because the mean of its divisors is an integer number (25240680).

Almost surely, 2^138823707 is an apocalyptic number.

138823707 is a deficient number, since it is larger than the sum of its proper divisors (63101733).

138823707 is a wasteful number, since it uses less digits than its factorization.

138823707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4206793.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 138823707 is about 11782.3472618999. The cubic root of 138823707 is about 517.7910575352.

The spelling of 138823707 in words is "one hundred thirty-eight million, eight hundred twenty-three thousand, seven hundred seven".