56421763 has 4 divisors (see below), whose sum is σ = 56530168. Its totient is φ = 56313360.

The previous prime is 56421689. The next prime is 56421787. The reversal of 56421763 is 36712465.

It is a happy number.

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-56421763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56422763) 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, 53418 + ... + 54463.

It is an arithmetic number, because the mean of its divisors is an integer number (14132542).

Almost surely, 2^56421763 is an apocalyptic number.

56421763 is a deficient number, since it is larger than the sum of its proper divisors (108405).

56421763 is a wasteful number, since it uses less digits than its factorization.

56421763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108404.

The product of its digits is 30240, while the sum is 34.

The square root of 56421763 is about 7511.4421384978. The cubic root of 56421763 is about 383.5443157823.

The spelling of 56421763 in words is "fifty-six million, four hundred twenty-one thousand, seven hundred sixty-three".