726389653 has 8 divisors (see below), whose sum is σ = 809285760. Its totient is φ = 646303680.

The previous prime is 726389567. The next prime is 726389663. The reversal of 726389653 is 356983627.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-726389653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 726389597 and 726389606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726389663) 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 7 ways as a sum of consecutive naturals, for example, 701988 + ... + 703021.

It is an arithmetic number, because the mean of its divisors is an integer number (101160720).

Almost surely, 2^726389653 is an apocalyptic number.

It is an amenable number.

726389653 is a deficient number, since it is larger than the sum of its proper divisors (82896107).

726389653 is a wasteful number, since it uses less digits than its factorization.

726389653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405067.

The product of its digits is 1632960, while the sum is 49.

The square root of 726389653 is about 26951.6168902721. The cubic root of 726389653 is about 898.9244984132.

The spelling of 726389653 in words is "seven hundred twenty-six million, three hundred eighty-nine thousand, six hundred fifty-three".