56817823 has 4 divisors (see below), whose sum is σ = 58650688. Its totient is φ = 54984960.

The previous prime is 56817811. The next prime is 56817833. The reversal of 56817823 is 32871865.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56817823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56817833) 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, 916386 + ... + 916447.

It is an arithmetic number, because the mean of its divisors is an integer number (14662672).

Almost surely, 2^56817823 is an apocalyptic number.

56817823 is a deficient number, since it is larger than the sum of its proper divisors (1832865).

56817823 is a wasteful number, since it uses less digits than its factorization.

56817823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1832864.

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

The square root of 56817823 is about 7537.7598131010. The cubic root of 56817823 is about 384.4396706398.

The spelling of 56817823 in words is "fifty-six million, eight hundred seventeen thousand, eight hundred twenty-three".