561294911 has 2 divisors, whose sum is σ = 561294912. Its totient is φ = 561294910.

The previous prime is 561294893. The next prime is 561294919. The reversal of 561294911 is 119492165.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561294911 is a prime.

It is a super-2 number, since 2×561294911² = 630103954228995842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561294919) 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 as a sum of consecutive naturals, namely, 280647455 + 280647456.

It is an arithmetic number, because the mean of its divisors is an integer number (280647456).

Almost surely, 2^561294911 is an apocalyptic number.

561294911 is a deficient number, since it is larger than the sum of its proper divisors (1).

561294911 is an equidigital number, since it uses as much as digits as its factorization.

561294911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 38.

The square root of 561294911 is about 23691.6633227809. The cubic root of 561294911 is about 824.8918920478.

The spelling of 561294911 in words is "five hundred sixty-one million, two hundred ninety-four thousand, nine hundred eleven".