23120999 has 4 divisors (see below), whose sum is σ = 25222920. Its totient is φ = 21019080.

The previous prime is 23120989. The next prime is 23121011. The reversal of 23120999 is 99902132.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23120999 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 (23120959) 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, 1050944 + ... + 1050965.

It is an arithmetic number, because the mean of its divisors is an integer number (6305730).

Almost surely, 2^23120999 is an apocalyptic number.

23120999 is a deficient number, since it is larger than the sum of its proper divisors (2101921).

23120999 is a wasteful number, since it uses less digits than its factorization.

23120999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101920.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 23120999 is about 4808.4299932514. The cubic root of 23120999 is about 284.8845289888.

The spelling of 23120999 in words is "twenty-three million, one hundred twenty thousand, nine hundred ninety-nine".