726679 has 2 divisors, whose sum is σ = 726680. Its totient is φ = 726678.

The previous prime is 726659. The next prime is 726689. The reversal of 726679 is 976627.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 726679 - 2⁵ = 726647 is a prime.

It is a Chen prime.

It is an Ulam number.

726679 is a lucky number.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363339 + 363340.

It is an arithmetic number, because the mean of its divisors is an integer number (363340).

2⁷²⁶⁶⁷⁹ is an apocalyptic number.

726679 is a deficient number, since it is larger than the sum of its proper divisors (1).

726679 is an equidigital number, since it uses as much as digits as its factorization.

726679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 37.

The square root of 726679 is about 852.4546908781. The cubic root of 726679 is about 89.9043840504.

The spelling of 726679 in words is "seven hundred twenty-six thousand, six hundred seventy-nine".