23019979 has 2 divisors, whose sum is σ = 23019980. Its totient is φ = 23019978.

The previous prime is 23019977. The next prime is 23020009. The reversal of 23019979 is 97991032.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23019979 - 2¹ = 23019977 is a prime.

Together with 23019977, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23019977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11509989 + 11509990.

It is an arithmetic number, because the mean of its divisors is an integer number (11509990).

Almost surely, 2^23019979 is an apocalyptic number.

23019979 is a deficient number, since it is larger than the sum of its proper divisors (1).

23019979 is an equidigital number, since it uses as much as digits as its factorization.

23019979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 23019979 is about 4797.9140259075. The cubic root of 23019979 is about 284.4690185283.

The spelling of 23019979 in words is "twenty-three million, nineteen thousand, nine hundred seventy-nine".