23142239 has 2 divisors, whose sum is σ = 23142240. Its totient is φ = 23142238.

The previous prime is 23142211. The next prime is 23142277. The reversal of 23142239 is 93224132.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23142239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23142289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11571119 + 11571120.

It is an arithmetic number, because the mean of its divisors is an integer number (11571120).

Almost surely, 2^23142239 is an apocalyptic number.

23142239 is a deficient number, since it is larger than the sum of its proper divisors (1).

23142239 is an equidigital number, since it uses as much as digits as its factorization.

23142239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 26.

The square root of 23142239 is about 4810.6381073616. The cubic root of 23142239 is about 284.9717382461.

The spelling of 23142239 in words is "twenty-three million, one hundred forty-two thousand, two hundred thirty-nine".