561884399 has 2 divisors, whose sum is σ = 561884400. Its totient is φ = 561884398.

The previous prime is 561884387. The next prime is 561884489. The reversal of 561884399 is 993488165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561884399 - 2⁸ = 561884143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 561884399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561884329) 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 as a sum of consecutive naturals, namely, 280942199 + 280942200.

It is an arithmetic number, because the mean of its divisors is an integer number (280942200).

Almost surely, 2^561884399 is an apocalyptic number.

561884399 is a deficient number, since it is larger than the sum of its proper divisors (1).

561884399 is an equidigital number, since it uses as much as digits as its factorization.

561884399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 53.

The square root of 561884399 is about 23704.1008899304. The cubic root of 561884399 is about 825.1805660479.

The spelling of 561884399 in words is "five hundred sixty-one million, eight hundred eighty-four thousand, three hundred ninety-nine".