23918393 has 2 divisors, whose sum is σ = 23918394. Its totient is φ = 23918392.

The previous prime is 23918387. The next prime is 23918429. The reversal of 23918393 is 39381932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23164969 + 753424 = 4813^2 + 868^2 .

It is a cyclic number.

It is not a de Polignac number, because 23918393 - 2¹⁴ = 23902009 is a prime.

It is a super-3 number, since 3×23918393³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (23918333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11959196 + 11959197.

It is an arithmetic number, because the mean of its divisors is an integer number (11959197).

Almost surely, 2^23918393 is an apocalyptic number.

It is an amenable number.

23918393 is a deficient number, since it is larger than the sum of its proper divisors (1).

23918393 is an equidigital number, since it uses as much as digits as its factorization.

23918393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 38.

The square root of 23918393 is about 4890.6434137034. The cubic root of 23918393 is about 288.1226048521.

The spelling of 23918393 in words is "twenty-three million, nine hundred eighteen thousand, three hundred ninety-three".