23139073 has 4 divisors (see below), whose sum is σ = 23151280. Its totient is φ = 23126868.

The previous prime is 23139043. The next prime is 23139119. The reversal of 23139073 is 37093132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 23139073 - 2⁵ = 23139041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23139043) 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, 2583 + ... + 7276.

It is an arithmetic number, because the mean of its divisors is an integer number (5787820).

Almost surely, 2^23139073 is an apocalyptic number.

It is an amenable number.

23139073 is a deficient number, since it is larger than the sum of its proper divisors (12207).

23139073 is an equidigital number, since it uses as much as digits as its factorization.

23139073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12206.

The product of its (nonzero) digits is 3402, while the sum is 28.

The square root of 23139073 is about 4810.3090337316. The cubic root of 23139073 is about 284.9587423605.

It can be divided in two parts, 231 and 39073, that added together give a cube (39304 = 34³).

The spelling of 23139073 in words is "twenty-three million, one hundred thirty-nine thousand, seventy-three".