23140279 has 2 divisors, whose sum is σ = 23140280. Its totient is φ = 23140278.

The previous prime is 23140241. The next prime is 23140283. The reversal of 23140279 is 97204132.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23140279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23140079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11570139 + 11570140.

It is an arithmetic number, because the mean of its divisors is an integer number (11570140).

Almost surely, 2^23140279 is an apocalyptic number.

23140279 is a deficient number, since it is larger than the sum of its proper divisors (1).

23140279 is an equidigital number, since it uses as much as digits as its factorization.

23140279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 23140279 is about 4810.4343878698. The cubic root of 23140279 is about 284.9636929229.

The spelling of 23140279 in words is "twenty-three million, one hundred forty thousand, two hundred seventy-nine".