561103427 has 2 divisors, whose sum is σ = 561103428. Its totient is φ = 561103426.

The previous prime is 561103391. The next prime is 561103429. The reversal of 561103427 is 724301165.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 561103427 - 2⁶ = 561103363 is a prime.

It is a super-2 number, since 2×561103427² = 629674111582288658, which contains 22 as substring.

Together with 561103429, it forms a pair of twin primes.

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 561103427.

It is not a weakly prime, because it can be changed into another prime (561103429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280551713 + 280551714.

It is an arithmetic number, because the mean of its divisors is an integer number (280551714).

Almost surely, 2^561103427 is an apocalyptic number.

561103427 is a deficient number, since it is larger than the sum of its proper divisors (1).

561103427 is an equidigital number, since it uses as much as digits as its factorization.

561103427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 561103427 is about 23687.6218097132. The cubic root of 561103427 is about 824.7980782842.

The spelling of 561103427 in words is "five hundred sixty-one million, one hundred three thousand, four hundred twenty-seven".