723563121 has 8 divisors (see below), whose sum is σ = 988281504. Its totient is φ = 470610080.

The previous prime is 723563117. The next prime is 723563123. The reversal of 723563121 is 121365327.

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 723563121 - 2² = 723563117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (723563123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2941191 + ... + 2941436.

It is an arithmetic number, because the mean of its divisors is an integer number (123535188).

Almost surely, 2^723563121 is an apocalyptic number.

It is an amenable number.

723563121 is a deficient number, since it is larger than the sum of its proper divisors (264718383).

723563121 is a wasteful number, since it uses less digits than its factorization.

723563121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5882671.

The product of its digits is 7560, while the sum is 30.

The square root of 723563121 is about 26899.1286290095. The cubic root of 723563121 is about 897.7570159032.

The spelling of 723563121 in words is "seven hundred twenty-three million, five hundred sixty-three thousand, one hundred twenty-one".