561747001 has 4 divisors (see below), whose sum is σ = 579867904. Its totient is φ = 543626100.

The previous prime is 561746993. The next prime is 561747007. The reversal of 561747001 is 100747165.

561747001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 561747001 - 2³ = 561746993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 18120871 = 561747001 / (5 + 6 + 1 + 7 + 4 + 7 + 0 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561747007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9060405 + ... + 9060466.

It is an arithmetic number, because the mean of its divisors is an integer number (144966976).

Almost surely, 2^561747001 is an apocalyptic number.

561747001 is the 10600-th centered decagonal number.

It is an amenable number.

561747001 is a deficient number, since it is larger than the sum of its proper divisors (18120903).

561747001 is a wasteful number, since it uses less digits than its factorization.

561747001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18120902.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 561747001 is about 23701.2025222350. The cubic root of 561747001 is about 825.1132998971.

The spelling of 561747001 in words is "five hundred sixty-one million, seven hundred forty-seven thousand, one".