561897499 has 2 divisors, whose sum is σ = 561897500. Its totient is φ = 561897498.

The previous prime is 561897493. The next prime is 561897509. The reversal of 561897499 is 994798165.

561897499 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561897499 - 2³ = 561897491 is a prime.

It is not a weakly prime, because it can be changed into another prime (561897491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280948749 + 280948750.

It is an arithmetic number, because the mean of its divisors is an integer number (280948750).

Almost surely, 2^561897499 is an apocalyptic number.

561897499 is a deficient number, since it is larger than the sum of its proper divisors (1).

561897499 is an equidigital number, since it uses as much as digits as its factorization.

561897499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4898880, while the sum is 58.

The square root of 561897499 is about 23704.3772118147. The cubic root of 561897499 is about 825.1869788624.

The spelling of 561897499 in words is "five hundred sixty-one million, eight hundred ninety-seven thousand, four hundred ninety-nine".