23898917 has 6 divisors (see below), whose sum is σ = 27800838. Its totient is φ = 20484744.

The previous prime is 23898913. The next prime is 23898943. The reversal of 23898917 is 71989832.

It can be written as a sum of positive squares in only one way, i.e., 23872996 + 25921 = 4886^2 + 161^2 .

It is not a de Polignac number, because 23898917 - 2² = 23898913 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23898913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 243818 + ... + 243915.

It is an arithmetic number, because the mean of its divisors is an integer number (4633473).

Almost surely, 2^23898917 is an apocalyptic number.

It is an amenable number.

23898917 is a deficient number, since it is larger than the sum of its proper divisors (3901921).

23898917 is an equidigital number, since it uses as much as digits as its factorization.

23898917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487747 (or 487740 counting only the distinct ones).

The product of its digits is 217728, while the sum is 47.

The square root of 23898917 is about 4888.6518591530. The cubic root of 23898917 is about 288.0443805385.

The spelling of 23898917 in words is "twenty-three million, eight hundred ninety-eight thousand, nine hundred seventeen".