726659 has 2 divisors, whose sum is σ = 726660. Its totient is φ = 726658.

The previous prime is 726647. The next prime is 726679. The reversal of 726659 is 956627.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 726659 - 2¹² = 722563 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (726619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363329 + 363330.

It is an arithmetic number, because the mean of its divisors is an integer number (363330).

2⁷²⁶⁶⁵⁹ is an apocalyptic number.

726659 is a deficient number, since it is larger than the sum of its proper divisors (1).

726659 is an equidigital number, since it uses as much as digits as its factorization.

726659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 35.

The square root of 726659 is about 852.4429599686. The cubic root of 726659 is about 89.9035592459.

The spelling of 726659 in words is "seven hundred twenty-six thousand, six hundred fifty-nine".