724778249 has 4 divisors (see below), whose sum is σ = 780530436. Its totient is φ = 669026064.

The previous prime is 724778213. The next prime is 724778261. The reversal of 724778249 is 942877427.

724778249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 160478224 + 564300025 = 12668^2 + 23755^2 .

It is a cyclic number.

It is not a de Polignac number, because 724778249 - 2¹⁶ = 724712713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 724778197 and 724778206.

It is not an unprimeable number, because it can be changed into a prime (724778449) 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, 27876074 + ... + 27876099.

It is an arithmetic number, because the mean of its divisors is an integer number (195132609).

Almost surely, 2^724778249 is an apocalyptic number.

It is an amenable number.

724778249 is a deficient number, since it is larger than the sum of its proper divisors (55752187).

724778249 is a wasteful number, since it uses less digits than its factorization.

724778249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55752186.

The product of its digits is 1580544, while the sum is 50.

The square root of 724778249 is about 26921.7059080586. The cubic root of 724778249 is about 898.2592893316.

The spelling of 724778249 in words is "seven hundred twenty-four million, seven hundred seventy-eight thousand, two hundred forty-nine".