561726087 has 24 divisors (see below), whose sum is σ = 858732624. Its totient is φ = 325338624.

The previous prime is 561726031. The next prime is 561726161. The reversal of 561726087 is 780627165.

It is not a de Polignac number, because 561726087 - 2⁸ = 561725831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561726007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23968 + ... + 41205.

It is an arithmetic number, because the mean of its divisors is an integer number (35780526).

Almost surely, 2^561726087 is an apocalyptic number.

561726087 is a deficient number, since it is larger than the sum of its proper divisors (297006537).

561726087 is a wasteful number, since it uses less digits than its factorization.

561726087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65219 (or 65206 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 561726087 is about 23700.7613168860. The cubic root of 561726087 is about 825.1030600360.

The spelling of 561726087 in words is "five hundred sixty-one million, seven hundred twenty-six thousand, eighty-seven".