724341985 has 4 divisors (see below), whose sum is σ = 869210388. Its totient is φ = 579473584.

The previous prime is 724341977. The next prime is 724342033. The reversal of 724341985 is 589143427.

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 499611904 + 224730081 = 22352^2 + 14991^2 .

It is a cyclic number.

It is not a de Polignac number, because 724341985 - 2³ = 724341977 is a prime.

It is a super-2 number, since 2×724341985² = 1049342622467480450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72434194 + ... + 72434203.

It is an arithmetic number, because the mean of its divisors is an integer number (217302597).

Almost surely, 2^724341985 is an apocalyptic number.

It is an amenable number.

724341985 is a deficient number, since it is larger than the sum of its proper divisors (144868403).

724341985 is a wasteful number, since it uses less digits than its factorization.

724341985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144868402.

The product of its digits is 241920, while the sum is 43.

The square root of 724341985 is about 26913.6022300992. The cubic root of 724341985 is about 898.0790241517.

The spelling of 724341985 in words is "seven hundred twenty-four million, three hundred forty-one thousand, nine hundred eighty-five".