561474879 has 16 divisors (see below), whose sum is σ = 873043200. Its totient is φ = 320842200.

The previous prime is 561474877. The next prime is 561474899. The reversal of 561474879 is 978474165.

It is not a de Polignac number, because 561474879 - 2¹ = 561474877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561474877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 271797 + ... + 273854.

It is an arithmetic number, because the mean of its divisors is an integer number (54565200).

Almost surely, 2^561474879 is an apocalyptic number.

561474879 is a deficient number, since it is larger than the sum of its proper divisors (311568321).

561474879 is an equidigital number, since it uses as much as digits as its factorization.

561474879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545675 (or 545661 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 51.

The square root of 561474879 is about 23695.4611476544. The cubic root of 561474879 is about 824.9800443291.

The spelling of 561474879 in words is "five hundred sixty-one million, four hundred seventy-four thousand, eight hundred seventy-nine".