139558243 has 4 divisors (see below), whose sum is σ = 152245368. Its totient is φ = 126871120.

The previous prime is 139558241. The next prime is 139558267. The reversal of 139558243 is 342855931.

139558243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 139558243 - 2¹ = 139558241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139558196 and 139558205.

It is not an unprimeable number, because it can be changed into a prime (139558241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6343546 + ... + 6343567.

It is an arithmetic number, because the mean of its divisors is an integer number (38061342).

Almost surely, 2^139558243 is an apocalyptic number.

139558243 is a deficient number, since it is larger than the sum of its proper divisors (12687125).

139558243 is a wasteful number, since it uses less digits than its factorization.

139558243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12687124.

The product of its digits is 129600, while the sum is 40.

The square root of 139558243 is about 11813.4771765133. The cubic root of 139558243 is about 518.7026869705.

The spelling of 139558243 in words is "one hundred thirty-nine million, five hundred fifty-eight thousand, two hundred forty-three".