561552907 has 2 divisors, whose sum is σ = 561552908. Its totient is φ = 561552906.

The previous prime is 561552773. The next prime is 561552913. The reversal of 561552907 is 709255165.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561552907 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 561552907.

It is not a weakly prime, because it can be changed into another prime (561552947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280776453 + 280776454.

It is an arithmetic number, because the mean of its divisors is an integer number (280776454).

Almost surely, 2^561552907 is an apocalyptic number.

561552907 is a deficient number, since it is larger than the sum of its proper divisors (1).

561552907 is an equidigital number, since it uses as much as digits as its factorization.

561552907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94500, while the sum is 40.

The square root of 561552907 is about 23697.1075661145. The cubic root of 561552907 is about 825.0182583042.

The spelling of 561552907 in words is "five hundred sixty-one million, five hundred fifty-two thousand, nine hundred seven".