23078561 has 4 divisors (see below), whose sum is σ = 25176624. Its totient is φ = 20980500.

The previous prime is 23078527. The next prime is 23078563. The reversal of 23078561 is 16587032.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23078561 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (23078563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1049015 + ... + 1049036.

It is an arithmetic number, because the mean of its divisors is an integer number (6294156).

Almost surely, 2^23078561 is an apocalyptic number.

It is an amenable number.

23078561 is a deficient number, since it is larger than the sum of its proper divisors (2098063).

23078561 is a wasteful number, since it uses less digits than its factorization.

23078561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2098062.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 23078561 is about 4804.0150915666. The cubic root of 23078561 is about 284.7101228265.

The spelling of 23078561 in words is "twenty-three million, seventy-eight thousand, five hundred sixty-one".