561807087 has 4 divisors (see below), whose sum is σ = 749076120. Its totient is φ = 374538056.

The previous prime is 561807019. The next prime is 561807089. The reversal of 561807087 is 780708165.

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

It is a cyclic number.

It is not a de Polignac number, because 561807087 - 2¹¹ = 561805039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561807089) 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, 93634512 + ... + 93634517.

It is an arithmetic number, because the mean of its divisors is an integer number (187269030).

Almost surely, 2^561807087 is an apocalyptic number.

561807087 is a deficient number, since it is larger than the sum of its proper divisors (187269033).

561807087 is a wasteful number, since it uses less digits than its factorization.

561807087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187269032.

The product of its (nonzero) digits is 94080, while the sum is 42.

The square root of 561807087 is about 23702.4700611561. The cubic root of 561807087 is about 825.1427176421.

The spelling of 561807087 in words is "five hundred sixty-one million, eight hundred seven thousand, eighty-seven".