724753 has 4 divisors (see below), whose sum is σ = 756288. Its totient is φ = 693220.

The previous prime is 724751. The next prime is 724769. The reversal of 724753 is 357427.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 357427 = 7 ⋅51061.

It is not a de Polignac number, because 724753 - 2¹ = 724751 is a prime.

It is a super-2 number, since 2×724753² = 1050533822018, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (724751) 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, 15733 + ... + 15778.

It is an arithmetic number, because the mean of its divisors is an integer number (189072).

2⁷²⁴⁷⁵³ is an apocalyptic number.

It is an amenable number.

724753 is a deficient number, since it is larger than the sum of its proper divisors (31535).

724753 is a wasteful number, since it uses less digits than its factorization.

724753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31534.

The product of its digits is 5880, while the sum is 28.

The square root of 724753 is about 851.3242625463. The cubic root of 724753 is about 89.8248858365.

The spelling of 724753 in words is "seven hundred twenty-four thousand, seven hundred fifty-three".