23979149 has 2 divisors, whose sum is σ = 23979150. Its totient is φ = 23979148.

The previous prime is 23979139. The next prime is 23979167. The reversal of 23979149 is 94197932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18550249 + 5428900 = 4307^2 + 2330^2 .

It is a cyclic number.

It is not a de Polignac number, because 23979149 - 2¹² = 23975053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23979119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11989574 + 11989575.

It is an arithmetic number, because the mean of its divisors is an integer number (11989575).

Almost surely, 2^23979149 is an apocalyptic number.

It is an amenable number.

23979149 is a deficient number, since it is larger than the sum of its proper divisors (1).

23979149 is an equidigital number, since it uses as much as digits as its factorization.

23979149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 44.

The square root of 23979149 is about 4896.8509268713. The cubic root of 23979149 is about 288.3663555646.

The spelling of 23979149 in words is "twenty-three million, nine hundred seventy-nine thousand, one hundred forty-nine".