23978329 has 2 divisors, whose sum is σ = 23978330. Its totient is φ = 23978328.

The previous prime is 23978327. The next prime is 23978377. The reversal of 23978329 is 92387932.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18688329 + 5290000 = 4323^2 + 2300^2 .

It is a cyclic number.

It is not a de Polignac number, because 23978329 - 2¹ = 23978327 is a prime.

Together with 23978327, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (23978327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11989164 + 11989165.

It is an arithmetic number, because the mean of its divisors is an integer number (11989165).

Almost surely, 2^23978329 is an apocalyptic number.

It is an amenable number.

23978329 is a deficient number, since it is larger than the sum of its proper divisors (1).

23978329 is an equidigital number, since it uses as much as digits as its factorization.

23978329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 43.

The square root of 23978329 is about 4896.7671988772. The cubic root of 23978329 is about 288.3630684990.

The spelling of 23978329 in words is "twenty-three million, nine hundred seventy-eight thousand, three hundred twenty-nine".