23140993 has 4 divisors (see below), whose sum is σ = 24358960. Its totient is φ = 21923028.

The previous prime is 23140963. The next prime is 23141017. The reversal of 23140993 is 39904132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23140993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23140903) 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, 608955 + ... + 608992.

It is an arithmetic number, because the mean of its divisors is an integer number (6089740).

Almost surely, 2^23140993 is an apocalyptic number.

It is an amenable number.

23140993 is a deficient number, since it is larger than the sum of its proper divisors (1217967).

23140993 is a wasteful number, since it uses less digits than its factorization.

23140993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217966.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 23140993 is about 4810.5086009693. The cubic root of 23140993 is about 284.9666237718.

The spelling of 23140993 in words is "twenty-three million, one hundred forty thousand, nine hundred ninety-three".