23947512917 has 4 divisors (see below), whose sum is σ = 23952681996. Its totient is φ = 23942343840.

The previous prime is 23947512913. The next prime is 23947512943. The reversal of 23947512917 is 71921574932.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8515413841 + 15432099076 = 92279^2 + 124226^2 .

It is a cyclic number.

It is not a de Polignac number, because 23947512917 - 2² = 23947512913 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 (23947512913) 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, 2577584 + ... + 2586857.

It is an arithmetic number, because the mean of its divisors is an integer number (5988170499).

Almost surely, 2^23947512917 is an apocalyptic number.

It is an amenable number.

23947512917 is a deficient number, since it is larger than the sum of its proper divisors (5169079).

23947512917 is an equidigital number, since it uses as much as digits as its factorization.

23947512917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5169078.

The product of its digits is 952560, while the sum is 50.

The spelling of 23947512917 in words is "twenty-three billion, nine hundred forty-seven million, five hundred twelve thousand, nine hundred seventeen".