561016723 has 4 divisors (see below), whose sum is σ = 561456640. Its totient is φ = 560576808.

The previous prime is 561016693. The next prime is 561016727. The reversal of 561016723 is 327610165.

561016723 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.

It is a cyclic number.

It is not a de Polignac number, because 561016723 - 2⁵ = 561016691 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561016727) 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, 218040 + ... + 220597.

It is an arithmetic number, because the mean of its divisors is an integer number (140364160).

Almost surely, 2^561016723 is an apocalyptic number.

561016723 is a deficient number, since it is larger than the sum of its proper divisors (439917).

561016723 is a wasteful number, since it uses less digits than its factorization.

561016723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439916.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 561016723 is about 23685.7915848299. The cubic root of 561016723 is about 824.7555923699.

Adding to 561016723 its reverse (327610165), we get a palindrome (888626888).

The spelling of 561016723 in words is "five hundred sixty-one million, sixteen thousand, seven hundred twenty-three".