23705139 has 4 divisors (see below), whose sum is σ = 31606856. Its totient is φ = 15803424.

The previous prime is 23705119. The next prime is 23705153. The reversal of 23705139 is 93150732.

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

It is not a de Polignac number, because 23705139 - 2⁵ = 23705107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23705119) 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, 3950854 + ... + 3950859.

It is an arithmetic number, because the mean of its divisors is an integer number (7901714).

Almost surely, 2^23705139 is an apocalyptic number.

23705139 is a deficient number, since it is larger than the sum of its proper divisors (7901717).

23705139 is an equidigital number, since it uses as much as digits as its factorization.

23705139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7901716.

The product of its (nonzero) digits is 5670, while the sum is 30.

The square root of 23705139 is about 4868.7923553998. The cubic root of 23705139 is about 287.2637565266.

The spelling of 23705139 in words is "twenty-three million, seven hundred five thousand, one hundred thirty-nine".