23878381 has 2 divisors, whose sum is σ = 23878382. Its totient is φ = 23878380.

The previous prime is 23878343. The next prime is 23878403. The reversal of 23878381 is 18387832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14478025 + 9400356 = 3805^2 + 3066^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23878381 is a prime.

It is a super-2 number, since 2×23878381² = 1140354158362322, which contains 22 as substring.

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

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23878321) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11939190 + 11939191.

It is an arithmetic number, because the mean of its divisors is an integer number (11939191).

Almost surely, 2^23878381 is an apocalyptic number.

It is an amenable number.

23878381 is a deficient number, since it is larger than the sum of its proper divisors (1).

23878381 is an equidigital number, since it uses as much as digits as its factorization.

23878381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 40.

The square root of 23878381 is about 4886.5510331930. The cubic root of 23878381 is about 287.9618527470.

The spelling of 23878381 in words is "twenty-three million, eight hundred seventy-eight thousand, three hundred eighty-one".