23140913 has 4 divisors (see below), whose sum is σ = 23577588. Its totient is φ = 22704240.

The previous prime is 23140903. The next prime is 23140919. The reversal of 23140913 is 31904132.

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 7711729 + 15429184 = 2777^2 + 3928^2 .

It is a cyclic number.

It is not a de Polignac number, because 23140913 - 2⁸ = 23140657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23140919) 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, 218258 + ... + 218363.

It is an arithmetic number, because the mean of its divisors is an integer number (5894397).

Almost surely, 2^23140913 is an apocalyptic number.

It is an amenable number.

23140913 is a deficient number, since it is larger than the sum of its proper divisors (436675).

23140913 is an equidigital number, since it uses as much as digits as its factorization.

23140913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436674.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 23140913 is about 4810.5002858331. The cubic root of 23140913 is about 284.9662953884.

It can be divided in two parts, 2 and 3140913, that multiplied together give a palindrome (6281826).

The spelling of 23140913 in words is "twenty-three million, one hundred forty thousand, nine hundred thirteen".