23039979 has 4 divisors (see below), whose sum is σ = 30719976. Its totient is φ = 15359984.

The previous prime is 23039977. The next prime is 23039993. The reversal of 23039979 is 97993032.

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 23039979 - 2¹ = 23039977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23039979.

It is not an unprimeable number, because it can be changed into a prime (23039971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3839994 + ... + 3839999.

It is an arithmetic number, because the mean of its divisors is an integer number (7679994).

Almost surely, 2^23039979 is an apocalyptic number.

23039979 is a deficient number, since it is larger than the sum of its proper divisors (7679997).

23039979 is an equidigital number, since it uses as much as digits as its factorization.

23039979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7679996.

The product of its (nonzero) digits is 91854, while the sum is 42.

The square root of 23039979 is about 4799.9978124995. The cubic root of 23039979 is about 284.5513779069.

The spelling of 23039979 in words is "twenty-three million, thirty-nine thousand, nine hundred seventy-nine".