561912307 has 16 divisors (see below), whose sum is σ = 637880832. Its totient is φ = 490503520.

The previous prime is 561912301. The next prime is 561912391. The reversal of 561912307 is 703219165.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561912307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561912301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17148 + ... + 37654.

It is an arithmetic number, because the mean of its divisors is an integer number (39867552).

Almost surely, 2^561912307 is an apocalyptic number.

561912307 is a deficient number, since it is larger than the sum of its proper divisors (75968525).

561912307 is a wasteful number, since it uses less digits than its factorization.

561912307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20618.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 561912307 is about 23704.6895571319. The cubic root of 561912307 is about 825.1942276706.

The spelling of 561912307 in words is "five hundred sixty-one million, nine hundred twelve thousand, three hundred seven".