23628139 has 2 divisors, whose sum is σ = 23628140. Its totient is φ = 23628138.

The previous prime is 23628131. The next prime is 23628151. The reversal of 23628139 is 93182632.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23628139 - 2³ = 23628131 is a prime.

It is not a weakly prime, because it can be changed into another prime (23628131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11814069 + 11814070.

It is an arithmetic number, because the mean of its divisors is an integer number (11814070).

Almost surely, 2^23628139 is an apocalyptic number.

23628139 is a deficient number, since it is larger than the sum of its proper divisors (1).

23628139 is an equidigital number, since it uses as much as digits as its factorization.

23628139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 34.

The square root of 23628139 is about 4860.8784185577. The cubic root of 23628139 is about 286.9523851938.

It can be divided in two parts, 2362 and 8139, that added together give a palindrome (10501).

The spelling of 23628139 in words is "twenty-three million, six hundred twenty-eight thousand, one hundred thirty-nine".