23042779 has 4 divisors (see below), whose sum is σ = 23604840. Its totient is φ = 22480720.

The previous prime is 23042741. The next prime is 23042783. The reversal of 23042779 is 97724032.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23042779 - 2¹³ = 23034587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23042729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280969 + ... + 281050.

It is an arithmetic number, because the mean of its divisors is an integer number (5901210).

Almost surely, 2^23042779 is an apocalyptic number.

23042779 is a deficient number, since it is larger than the sum of its proper divisors (562061).

23042779 is an equidigital number, since it uses as much as digits as its factorization.

23042779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562060.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 23042779 is about 4800.2894704382. The cubic root of 23042779 is about 284.5629044160.

The spelling of 23042779 in words is "twenty-three million, forty-two thousand, seven hundred seventy-nine".