23971979 has 2 divisors, whose sum is σ = 23971980. Its totient is φ = 23971978.

The previous prime is 23971931. The next prime is 23971991. The reversal of 23971979 is 97917932.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23971979 - 2⁸ = 23971723 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23971279) 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, 11985989 + 11985990.

It is an arithmetic number, because the mean of its divisors is an integer number (11985990).

Almost surely, 2^23971979 is an apocalyptic number.

23971979 is a deficient number, since it is larger than the sum of its proper divisors (1).

23971979 is an equidigital number, since it uses as much as digits as its factorization.

23971979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 214326, while the sum is 47.

The square root of 23971979 is about 4896.1187689843. The cubic root of 23971979 is about 288.3376112463.

The spelling of 23971979 in words is "twenty-three million, nine hundred seventy-one thousand, nine hundred seventy-nine".