139443423 has 8 divisors (see below), whose sum is σ = 212485248. Its totient is φ = 79681944.

The previous prime is 139443383. The next prime is 139443431. The reversal of 139443423 is 324344931.

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

It is not a de Polignac number, because 139443423 - 2⁸ = 139443167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139443433) 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, 3320061 + ... + 3320102.

It is an arithmetic number, because the mean of its divisors is an integer number (26560656).

Almost surely, 2^139443423 is an apocalyptic number.

139443423 is a deficient number, since it is larger than the sum of its proper divisors (73041825).

139443423 is an equidigital number, since it uses as much as digits as its factorization.

139443423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6640173.

The product of its digits is 31104, while the sum is 33.

The square root of 139443423 is about 11808.6164727287. The cubic root of 139443423 is about 518.5603956420.

The spelling of 139443423 in words is "one hundred thirty-nine million, four hundred forty-three thousand, four hundred twenty-three".