724399 has 8 divisors (see below), whose sum is σ = 789152. Its totient is φ = 660960.

The previous prime is 724393. The next prime is 724403. The reversal of 724399 is 993427.

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 724399 - 2¹⁵ = 691631 is a prime.

It is a super-2 number, since 2×724399² = 1049507822402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724393) 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, 1069 + ... + 1609.

It is an arithmetic number, because the mean of its divisors is an integer number (98644).

2⁷²⁴³⁹⁹ is an apocalyptic number.

724399 is a deficient number, since it is larger than the sum of its proper divisors (64753).

724399 is a wasteful number, since it uses less digits than its factorization.

724399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657.

The product of its digits is 13608, while the sum is 34.

The square root of 724399 is about 851.1163257746. The cubic root of 724399 is about 89.8102586978.

The spelling of 724399 in words is "seven hundred twenty-four thousand, three hundred ninety-nine".