139500023 has 8 divisors (see below), whose sum is σ = 150502800. Its totient is φ = 128536128.

The previous prime is 139499993. The next prime is 139500061. The reversal of 139500023 is 320005931.

It is a happy number.

139500023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 139500023 - 2⁶ = 139499959 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 (139500923) 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, 2033 + ... + 16826.

It is an arithmetic number, because the mean of its divisors is an integer number (18812850).

Almost surely, 2^139500023 is an apocalyptic number.

139500023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

139500023 is a deficient number, since it is larger than the sum of its proper divisors (11002777).

139500023 is a wasteful number, since it uses less digits than its factorization.

139500023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19441.

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 139500023 is about 11811.0127846853. The cubic root of 139500023 is about 518.6305472671.

Adding to 139500023 its reverse (320005931), we get a palindrome (459505954).

The spelling of 139500023 in words is "one hundred thirty-nine million, five hundred thousand, twenty-three".