139111223 has 4 divisors (see below), whose sum is σ = 141070608. Its totient is φ = 137151840.

The previous prime is 139111213. The next prime is 139111261. The reversal of 139111223 is 322111931.

139111223 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 139111223 - 2⁴ = 139111207 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 (139111213) 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, 979586 + ... + 979727.

It is an arithmetic number, because the mean of its divisors is an integer number (35267652).

Almost surely, 2^139111223 is an apocalyptic number.

139111223 is a deficient number, since it is larger than the sum of its proper divisors (1959385).

139111223 is an equidigital number, since it uses as much as digits as its factorization.

139111223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1959384.

The product of its digits is 324, while the sum is 23.

The square root of 139111223 is about 11794.5420852189. The cubic root of 139111223 is about 518.1482745133.

The spelling of 139111223 in words is "one hundred thirty-nine million, one hundred eleven thousand, two hundred twenty-three".