23278613 has 8 divisors (see below), whose sum is σ = 24193536. Its totient is φ = 22374000.

The previous prime is 23278603. The next prime is 23278621. The reversal of 23278613 is 31687232.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23278613 - 2¹⁰ = 23277589 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 23278613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23278603) 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 in 7 ways as a sum of consecutive naturals, for example, 2195 + ... + 7167.

It is an arithmetic number, because the mean of its divisors is an integer number (3024192).

Almost surely, 2^23278613 is an apocalyptic number.

It is an amenable number.

23278613 is a deficient number, since it is larger than the sum of its proper divisors (914923).

23278613 is a wasteful number, since it uses less digits than its factorization.

23278613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5155.

The product of its digits is 12096, while the sum is 32.

The square root of 23278613 is about 4824.7914980857. The cubic root of 23278613 is about 285.5304085804.

The spelling of 23278613 in words is "twenty-three million, two hundred seventy-eight thousand, six hundred thirteen".