726397 has 8 divisors (see below), whose sum is σ = 850752. Its totient is φ = 607200.

The previous prime is 726391. The next prime is 726413. The reversal of 726397 is 793627.

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

It is a cyclic number.

It is not a de Polignac number, because 726397 - 2¹⁵ = 693629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 979 + ... + 1552.

It is an arithmetic number, because the mean of its divisors is an integer number (106344).

2⁷²⁶³⁹⁷ is an apocalyptic number.

It is an amenable number.

726397 is a deficient number, since it is larger than the sum of its proper divisors (124355).

726397 is a wasteful number, since it uses less digits than its factorization.

726397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2579.

The product of its digits is 15876, while the sum is 34.

The square root of 726397 is about 852.2892701425. The cubic root of 726397 is about 89.8927529099.

The spelling of 726397 in words is "seven hundred twenty-six thousand, three hundred ninety-seven".