139423243 has 8 divisors (see below), whose sum is σ = 142828400. Its totient is φ = 136025568.

The previous prime is 139423237. The next prime is 139423261. The reversal of 139423243 is 342324931.

139423243 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 a de Polignac number, because none of the positive numbers 2^k-139423243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139423043) 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, 60313 + ... + 62581.

It is an arithmetic number, because the mean of its divisors is an integer number (17853550).

Almost surely, 2^139423243 is an apocalyptic number.

139423243 is a deficient number, since it is larger than the sum of its proper divisors (3405157).

139423243 is a wasteful number, since it uses less digits than its factorization.

139423243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3741.

The product of its digits is 15552, while the sum is 31.

The square root of 139423243 is about 11807.7619810022. The cubic root of 139423243 is about 518.5353793943.

The spelling of 139423243 in words is "one hundred thirty-nine million, four hundred twenty-three thousand, two hundred forty-three".