724019 has 4 divisors (see below), whose sum is σ = 741720. Its totient is φ = 706320.

The previous prime is 724007. The next prime is 724021. The reversal of 724019 is 910427.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-724019 is a prime.

It is a super-2 number, since 2×724019² = 1048407024722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 723985 and 724003.

It is not an unprimeable number, because it can be changed into a prime (724079) 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, 8789 + ... + 8870.

It is an arithmetic number, because the mean of its divisors is an integer number (185430).

2⁷²⁴⁰¹⁹ is an apocalyptic number.

724019 is a deficient number, since it is larger than the sum of its proper divisors (17701).

724019 is a wasteful number, since it uses less digits than its factorization.

724019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17700.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 724019 is about 850.8930602608. The cubic root of 724019 is about 89.7945519452.

The spelling of 724019 in words is "seven hundred twenty-four thousand, nineteen".