23409779 has 2 divisors, whose sum is σ = 23409780. Its totient is φ = 23409778.

The previous prime is 23409769. The next prime is 23409797. The reversal of 23409779 is 97790432.

Together with next prime (23409797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23409779 - 2⁸ = 23409523 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23409719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11704889 + 11704890.

It is an arithmetic number, because the mean of its divisors is an integer number (11704890).

Almost surely, 2^23409779 is an apocalyptic number.

23409779 is a deficient number, since it is larger than the sum of its proper divisors (1).

23409779 is an equidigital number, since it uses as much as digits as its factorization.

23409779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 41.

The square root of 23409779 is about 4838.3653231231. The cubic root of 23409779 is about 286.0656890207.

The spelling of 23409779 in words is "twenty-three million, four hundred nine thousand, seven hundred seventy-nine".