723608561 has 8 divisors (see below), whose sum is σ = 780945984. Its totient is φ = 666510480.

The previous prime is 723608539. The next prime is 723608591. The reversal of 723608561 is 165806327.

723608561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 723608561 - 2¹⁰ = 723607537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (723608591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53525 + ... + 65666.

It is an arithmetic number, because the mean of its divisors is an integer number (97618248).

Almost surely, 2^723608561 is an apocalyptic number.

It is an amenable number.

723608561 is a deficient number, since it is larger than the sum of its proper divisors (57337423).

723608561 is a wasteful number, since it uses less digits than its factorization.

723608561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119671.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 723608561 is about 26899.9732527748. The cubic root of 723608561 is about 897.7758086543.

The spelling of 723608561 in words is "seven hundred twenty-three million, six hundred eight thousand, five hundred sixty-one".