23139203 has 4 divisors (see below), whose sum is σ = 23677368. Its totient is φ = 22601040.

The previous prime is 23139197. The next prime is 23139223. The reversal of 23139203 is 30293132.

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 23139203 - 2⁶ = 23139139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23139223) 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, 269018 + ... + 269103.

It is an arithmetic number, because the mean of its divisors is an integer number (5919342).

Almost surely, 2^23139203 is an apocalyptic number.

23139203 is a deficient number, since it is larger than the sum of its proper divisors (538165).

23139203 is an equidigital number, since it uses as much as digits as its factorization.

23139203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538164.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 23139203 is about 4810.3225463580. The cubic root of 23139203 is about 284.9592760115.

The spelling of 23139203 in words is "twenty-three million, one hundred thirty-nine thousand, two hundred three".