23078581 has 2 divisors, whose sum is σ = 23078582. Its totient is φ = 23078580.

The previous prime is 23078579. The next prime is 23078593. The reversal of 23078581 is 18587032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21022225 + 2056356 = 4585^2 + 1434^2 .

It is a cyclic number.

It is not a de Polignac number, because 23078581 - 2¹ = 23078579 is a prime.

It is a super-2 number, since 2×23078581² = 1065241801947122, which contains 22 as substring.

Together with 23078579, it forms a pair of twin primes.

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 (23078281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11539290 + 11539291.

It is an arithmetic number, because the mean of its divisors is an integer number (11539291).

Almost surely, 2^23078581 is an apocalyptic number.

It is an amenable number.

23078581 is a deficient number, since it is larger than the sum of its proper divisors (1).

23078581 is an equidigital number, since it uses as much as digits as its factorization.

23078581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 23078581 is about 4804.0171731583. The cubic root of 23078581 is about 284.7102050703.

The spelling of 23078581 in words is "twenty-three million, seventy-eight thousand, five hundred eighty-one".