23203613 has 2 divisors, whose sum is σ = 23203614. Its totient is φ = 23203612.

The previous prime is 23203603. The next prime is 23203627. The reversal of 23203613 is 31630232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22629049 + 574564 = 4757^2 + 758^2 .

It is a cyclic number.

It is not a de Polignac number, because 23203613 - 2⁴ = 23203597 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23203603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11601806 + 11601807.

It is an arithmetic number, because the mean of its divisors is an integer number (11601807).

Almost surely, 2^23203613 is an apocalyptic number.

It is an amenable number.

23203613 is a deficient number, since it is larger than the sum of its proper divisors (1).

23203613 is an equidigital number, since it uses as much as digits as its factorization.

23203613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 23203613 is about 4817.0128710644. The cubic root of 23203613 is about 285.2234341022.

Adding to 23203613 its reverse (31630232), we get a palindrome (54833845).

The spelling of 23203613 in words is "twenty-three million, two hundred three thousand, six hundred thirteen".