23140399 has 2 divisors, whose sum is σ = 23140400. Its totient is φ = 23140398.

The previous prime is 23140379. The next prime is 23140409. The reversal of 23140399 is 99304132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23140399 - 2²³ = 14751791 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23140399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23140319) 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 as a sum of consecutive naturals, namely, 11570199 + 11570200.

It is an arithmetic number, because the mean of its divisors is an integer number (11570200).

Almost surely, 2^23140399 is an apocalyptic number.

23140399 is a deficient number, since it is larger than the sum of its proper divisors (1).

23140399 is an equidigital number, since it uses as much as digits as its factorization.

23140399 is an odious number, because the sum of its binary digits is odd.

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

The square root of 23140399 is about 4810.4468607397. The cubic root of 23140399 is about 284.9641855067.

The spelling of 23140399 in words is "twenty-three million, one hundred forty thousand, three hundred ninety-nine".