724521373 has 4 divisors (see below), whose sum is σ = 742192668. Its totient is φ = 706850080.

The previous prime is 724521361. The next prime is 724521377. The reversal of 724521373 is 373125427.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 373125427 = 37 ⋅10084471.

It can be written as a sum of positive squares in 2 ways, for example, as 183819364 + 540702009 = 13558^2 + 23253^2 .

It is a cyclic number.

It is not a de Polignac number, because 724521373 - 2²¹ = 722424221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724521377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8835586 + ... + 8835667.

It is an arithmetic number, because the mean of its divisors is an integer number (185548167).

Almost surely, 2^724521373 is an apocalyptic number.

It is an amenable number.

724521373 is a deficient number, since it is larger than the sum of its proper divisors (17671295).

724521373 is a wasteful number, since it uses less digits than its factorization.

724521373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17671294.

The product of its digits is 35280, while the sum is 34.

The square root of 724521373 is about 26916.9346880361. The cubic root of 724521373 is about 898.1531564012.

The spelling of 724521373 in words is "seven hundred twenty-four million, five hundred twenty-one thousand, three hundred seventy-three".