561844039 has 2 divisors, whose sum is σ = 561844040. Its totient is φ = 561844038.

The previous prime is 561843991. The next prime is 561844061. The reversal of 561844039 is 930448165.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 561844039 - 2¹¹ = 561841991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 561843992 and 561844010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561844139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280922019 + 280922020.

It is an arithmetic number, because the mean of its divisors is an integer number (280922020).

Almost surely, 2^561844039 is an apocalyptic number.

561844039 is a deficient number, since it is larger than the sum of its proper divisors (1).

561844039 is an equidigital number, since it uses as much as digits as its factorization.

561844039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 561844039 is about 23703.2495451573. The cubic root of 561844039 is about 825.1608080780.

The spelling of 561844039 in words is "five hundred sixty-one million, eight hundred forty-four thousand, thirty-nine".