561424763 has 4 divisors (see below), whose sum is σ = 562891008. Its totient is φ = 559958520.

The previous prime is 561424723. The next prime is 561424781. The reversal of 561424763 is 367424165.

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-561424763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561424723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 732548 + ... + 733313.

It is an arithmetic number, because the mean of its divisors is an integer number (140722752).

Almost surely, 2^561424763 is an apocalyptic number.

561424763 is a deficient number, since it is larger than the sum of its proper divisors (1466245).

561424763 is a wasteful number, since it uses less digits than its factorization.

561424763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1466244.

The product of its digits is 120960, while the sum is 38.

The square root of 561424763 is about 23694.4036219526. The cubic root of 561424763 is about 824.9554983036.

The spelling of 561424763 in words is "five hundred sixty-one million, four hundred twenty-four thousand, seven hundred sixty-three".