561700087 has 16 divisors (see below), whose sum is σ = 612954720. Its totient is φ = 511632000.

The previous prime is 561700063. The next prime is 561700091. The reversal of 561700087 is 780007165.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561700087 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 (561700037) 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, 549637 + ... + 550657.

It is an arithmetic number, because the mean of its divisors is an integer number (38309670).

Almost surely, 2^561700087 is an apocalyptic number.

561700087 is a deficient number, since it is larger than the sum of its proper divisors (51254633).

561700087 is a wasteful number, since it uses less digits than its factorization.

561700087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1554.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 561700087 is about 23700.2128049518. The cubic root of 561700087 is about 825.0903296258.

The spelling of 561700087 in words is "five hundred sixty-one million, seven hundred thousand, eighty-seven".