726619 has 2 divisors, whose sum is σ = 726620. Its totient is φ = 726618.

The previous prime is 726611. The next prime is 726623. The reversal of 726619 is 916627.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 726619 - 2³ = 726611 is a prime.

It is a super-2 number, since 2×726619² = 1055950342322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (726611) 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, 363309 + 363310.

It is an arithmetic number, because the mean of its divisors is an integer number (363310).

2⁷²⁶⁶¹⁹ is an apocalyptic number.

726619 is a deficient number, since it is larger than the sum of its proper divisors (1).

726619 is an equidigital number, since it uses as much as digits as its factorization.

726619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 31.

The square root of 726619 is about 852.4194976653. The cubic root of 726619 is about 89.9019095917.

The spelling of 726619 in words is "seven hundred twenty-six thousand, six hundred nineteen".