23142391 has 2 divisors, whose sum is σ = 23142392. Its totient is φ = 23142390.

The previous prime is 23142367. The next prime is 23142419. The reversal of 23142391 is 19324132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23142391 - 2¹⁹ = 22618103 is a prime.

It is a super-2 number, since 2×23142391² = 1071140522393762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23142311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11571195 + 11571196.

It is an arithmetic number, because the mean of its divisors is an integer number (11571196).

Almost surely, 2^23142391 is an apocalyptic number.

23142391 is a deficient number, since it is larger than the sum of its proper divisors (1).

23142391 is an equidigital number, since it uses as much as digits as its factorization.

23142391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 25.

The square root of 23142391 is about 4810.6539056557. The cubic root of 23142391 is about 284.9723621501.

The spelling of 23142391 in words is "twenty-three million, one hundred forty-two thousand, three hundred ninety-one".