23678581 has 2 divisors, whose sum is σ = 23678582. Its totient is φ = 23678580.

The previous prime is 23678561. The next prime is 23678593. The reversal of 23678581 is 18587632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23677956 + 625 = 4866^2 + 25^2 .

It is a cyclic number.

It is not a de Polignac number, because 23678581 - 2⁵ = 23678549 is a prime.

It is a super-2 number, since 2×23678581² = 1121350396347122, 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 (23678531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11839290 + 11839291.

It is an arithmetic number, because the mean of its divisors is an integer number (11839291).

Almost surely, 2^23678581 is an apocalyptic number.

It is an amenable number.

23678581 is a deficient number, since it is larger than the sum of its proper divisors (1).

23678581 is an equidigital number, since it uses as much as digits as its factorization.

23678581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 40.

The square root of 23678581 is about 4866.0642207024. The cubic root of 23678581 is about 287.1564380007.

The spelling of 23678581 in words is "twenty-three million, six hundred seventy-eight thousand, five hundred eighty-one".