561651047 has 2 divisors, whose sum is σ = 561651048. Its totient is φ = 561651046.

The previous prime is 561651043. The next prime is 561651113. The reversal of 561651047 is 740156165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561651047 - 2² = 561651043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 561650998 and 561651016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561651043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280825523 + 280825524.

It is an arithmetic number, because the mean of its divisors is an integer number (280825524).

Almost surely, 2^561651047 is an apocalyptic number.

561651047 is a deficient number, since it is larger than the sum of its proper divisors (1).

561651047 is an equidigital number, since it uses as much as digits as its factorization.

561651047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 561651047 is about 23699.1781925028. The cubic root of 561651047 is about 825.0663170443.

The spelling of 561651047 in words is "five hundred sixty-one million, six hundred fifty-one thousand, forty-seven".