561999493 has 4 divisors (see below), whose sum is σ = 613090368. Its totient is φ = 510908620.

The previous prime is 561999469. The next prime is 561999517. The reversal of 561999493 is 394999165.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (561999469) and next prime (561999517).

It is a cyclic number.

It is not a de Polignac number, because 561999493 - 2⁹ = 561998981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561909493) 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, 25545421 + ... + 25545442.

It is an arithmetic number, because the mean of its divisors is an integer number (153272592).

Almost surely, 2^561999493 is an apocalyptic number.

It is an amenable number.

561999493 is a deficient number, since it is larger than the sum of its proper divisors (51090875).

561999493 is a wasteful number, since it uses less digits than its factorization.

561999493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51090874.

The product of its digits is 2361960, while the sum is 55.

The square root of 561999493 is about 23706.5284890049. The cubic root of 561999493 is about 825.2369043554.

The spelling of 561999493 in words is "five hundred sixty-one million, nine hundred ninety-nine thousand, four hundred ninety-three".