561667249 has 32 divisors (see below), whose sum is σ = 678956544. Its totient is φ = 457850880.

The previous prime is 561667243. The next prime is 561667367. The reversal of 561667249 is 942766165.

561667249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 561667249 - 2⁵ = 561667217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 561667199 and 561667208.

It is not an unprimeable number, because it can be changed into a prime (561667243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1296937 + ... + 1297369.

It is an arithmetic number, because the mean of its divisors is an integer number (21217392).

Almost surely, 2^561667249 is an apocalyptic number.

It is an amenable number.

561667249 is a deficient number, since it is larger than the sum of its proper divisors (117289295).

561667249 is a wasteful number, since it uses less digits than its factorization.

561667249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697.

The product of its digits is 544320, while the sum is 46.

The square root of 561667249 is about 23699.5200162366. The cubic root of 561667249 is about 825.0742505563.

The spelling of 561667249 in words is "five hundred sixty-one million, six hundred sixty-seven thousand, two hundred forty-nine".