724923569 has 4 divisors (see below), whose sum is σ = 725197044. Its totient is φ = 724650096.

The previous prime is 724923557. The next prime is 724923593. The reversal of 724923569 is 965329427.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10163344 + 714760225 = 3188^2 + 26735^2 .

It is a cyclic number.

It is not a de Polignac number, because 724923569 - 2¹⁶ = 724858033 is a prime.

It is a super-2 number, since 2×724923569² = 1051028361783395522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (724623569) 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, 132722 + ... + 138075.

It is an arithmetic number, because the mean of its divisors is an integer number (181299261).

Almost surely, 2^724923569 is an apocalyptic number.

It is an amenable number.

724923569 is a deficient number, since it is larger than the sum of its proper divisors (273475).

724923569 is a wasteful number, since it uses less digits than its factorization.

724923569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273474.

The product of its digits is 816480, while the sum is 47.

The square root of 724923569 is about 26924.4047102253. The cubic root of 724923569 is about 898.3193197923.

The spelling of 724923569 in words is "seven hundred twenty-four million, nine hundred twenty-three thousand, five hundred sixty-nine".