23903639 has 2 divisors, whose sum is σ = 23903640. Its totient is φ = 23903638.

The previous prime is 23903617. The next prime is 23903669. The reversal of 23903639 is 93630932.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23903639 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 23903599 and 23903608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23903669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11951819 + 11951820.

It is an arithmetic number, because the mean of its divisors is an integer number (11951820).

Almost surely, 2^23903639 is an apocalyptic number.

23903639 is a deficient number, since it is larger than the sum of its proper divisors (1).

23903639 is an equidigital number, since it uses as much as digits as its factorization.

23903639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 35.

The square root of 23903639 is about 4889.1347905330. The cubic root of 23903639 is about 288.0633501009.

It can be divided in two parts, 23903 and 639, that added together give a palindrome (24542).

The spelling of 23903639 in words is "twenty-three million, nine hundred three thousand, six hundred thirty-nine".