561637103 has 4 divisors (see below), whose sum is σ = 564459600. Its totient is φ = 558814608.

The previous prime is 561637079. The next prime is 561637127. The reversal of 561637103 is 301736165.

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

It is an interprime number because it is at equal distance from previous prime (561637079) and next prime (561637127).

It is a cyclic number.

It is not a de Polignac number, because 561637103 - 2⁶ = 561637039 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 561637103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561637183) 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 3 ways as a sum of consecutive naturals, for example, 1410950 + ... + 1411347.

It is an arithmetic number, because the mean of its divisors is an integer number (141114900).

Almost surely, 2^561637103 is an apocalyptic number.

561637103 is a deficient number, since it is larger than the sum of its proper divisors (2822497).

561637103 is a wasteful number, since it uses less digits than its factorization.

561637103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2822496.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 561637103 is about 23698.8840032606. The cubic root of 561637103 is about 825.0594890681.

The spelling of 561637103 in words is "five hundred sixty-one million, six hundred thirty-seven thousand, one hundred three".