23878321 has 2 divisors, whose sum is σ = 23878322. Its totient is φ = 23878320.

The previous prime is 23878313. The next prime is 23878343. The reversal of 23878321 is 12387832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23415921 + 462400 = 4839^2 + 680^2 .

It is a cyclic number.

It is not a de Polignac number, because 23878321 - 2³ = 23878313 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (23878381) 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, 11939160 + 11939161.

It is an arithmetic number, because the mean of its divisors is an integer number (11939161).

Almost surely, 2^23878321 is an apocalyptic number.

It is an amenable number.

23878321 is a deficient number, since it is larger than the sum of its proper divisors (1).

23878321 is an equidigital number, since it uses as much as digits as its factorization.

23878321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 34.

The square root of 23878321 is about 4886.5448938898. The cubic root of 23878321 is about 287.9616115564.

The spelling of 23878321 in words is "twenty-three million, eight hundred seventy-eight thousand, three hundred twenty-one".