726418369 has 2 divisors, whose sum is σ = 726418370. Its totient is φ = 726418368.

The previous prime is 726418333. The next prime is 726418397. The reversal of 726418369 is 963814627.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 718883344 + 7535025 = 26812^2 + 2745^2 .

It is a cyclic number.

It is not a de Polignac number, because 726418369 - 2¹³ = 726410177 is a prime.

It is a super-2 number, since 2×726418369² = 1055367293641240322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (726418769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363209184 + 363209185.

It is an arithmetic number, because the mean of its divisors is an integer number (363209185).

Almost surely, 2^726418369 is an apocalyptic number.

It is an amenable number.

726418369 is a deficient number, since it is larger than the sum of its proper divisors (1).

726418369 is an equidigital number, since it uses as much as digits as its factorization.

726418369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 46.

The square root of 726418369 is about 26952.1496174238. The cubic root of 726418369 is about 898.9363438351.

The spelling of 726418369 in words is "seven hundred twenty-six million, four hundred eighteen thousand, three hundred sixty-nine".