139935823 has 6 divisors (see below), whose sum is σ = 148651856. Its totient is φ = 131704032.

The previous prime is 139935811. The next prime is 139935863. The reversal of 139935823 is 328539931.

It is not a de Polignac number, because 139935823 - 2⁵ = 139935791 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 139935823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139935863) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 241815 + ... + 242392.

Almost surely, 2^139935823 is an apocalyptic number.

139935823 is a deficient number, since it is larger than the sum of its proper divisors (8716033).

139935823 is an equidigital number, since it uses as much as digits as its factorization.

139935823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484241 (or 484224 counting only the distinct ones).

The product of its digits is 174960, while the sum is 43.

The square root of 139935823 is about 11829.4472821007. The cubic root of 139935823 is about 519.1700555121.

The spelling of 139935823 in words is "one hundred thirty-nine million, nine hundred thirty-five thousand, eight hundred twenty-three".