23120291 has 4 divisors (see below), whose sum is σ = 23267712. Its totient is φ = 22972872.

The previous prime is 23120249. The next prime is 23120299. The reversal of 23120291 is 19202132.

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

It is a cyclic number.

It is not a de Polignac number, because 23120291 - 2¹⁰ = 23119267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23120299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73475 + ... + 73788.

It is an arithmetic number, because the mean of its divisors is an integer number (5816928).

Almost surely, 2^23120291 is an apocalyptic number.

23120291 is a deficient number, since it is larger than the sum of its proper divisors (147421).

23120291 is a wasteful number, since it uses less digits than its factorization.

23120291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147420.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 23120291 is about 4808.3563719841. The cubic root of 23120291 is about 284.8816210939.

The spelling of 23120291 in words is "twenty-three million, one hundred twenty thousand, two hundred ninety-one".