23142979 has 2 divisors, whose sum is σ = 23142980. Its totient is φ = 23142978.

The previous prime is 23142949. The next prime is 23142997. The reversal of 23142979 is 97924132.

Together with next prime (23142997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23142979 - 2⁹ = 23142467 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23142919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11571489 + 11571490.

It is an arithmetic number, because the mean of its divisors is an integer number (11571490).

Almost surely, 2^23142979 is an apocalyptic number.

23142979 is a deficient number, since it is larger than the sum of its proper divisors (1).

23142979 is an equidigital number, since it uses as much as digits as its factorization.

23142979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 37.

The square root of 23142979 is about 4810.7150196203. The cubic root of 23142979 is about 284.9747756479.

The spelling of 23142979 in words is "twenty-three million, one hundred forty-two thousand, nine hundred seventy-nine".