23442391 has 4 divisors (see below), whose sum is σ = 26791312. Its totient is φ = 20093472.

The previous prime is 23442379. The next prime is 23442401. The reversal of 23442391 is 19324432.

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

It is not a de Polignac number, because 23442391 - 2⁹ = 23441879 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 (23442301) 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, 1674450 + ... + 1674463.

It is an arithmetic number, because the mean of its divisors is an integer number (6697828).

Almost surely, 2^23442391 is an apocalyptic number.

23442391 is a deficient number, since it is larger than the sum of its proper divisors (3348921).

23442391 is an equidigital number, since it uses as much as digits as its factorization.

23442391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3348920.

The product of its digits is 5184, while the sum is 28.

The square root of 23442391 is about 4841.7342967164. The cubic root of 23442391 is about 286.1984660888.

The spelling of 23442391 in words is "twenty-three million, four hundred forty-two thousand, three hundred ninety-one".