726368449 has 2 divisors, whose sum is σ = 726368450. Its totient is φ = 726368448.

The previous prime is 726368443. The next prime is 726368473. The reversal of 726368449 is 944863627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 418611600 + 307756849 = 20460^2 + 17543^2 .

It is a cyclic number.

It is not a de Polignac number, because 726368449 - 2⁵ = 726368417 is a prime.

It is a super-2 number, since 2×726368449² = 1055222247405331202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (726368443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363184224 + 363184225.

It is an arithmetic number, because the mean of its divisors is an integer number (363184225).

Almost surely, 2^726368449 is an apocalyptic number.

It is an amenable number.

726368449 is a deficient number, since it is larger than the sum of its proper divisors (1).

726368449 is an equidigital number, since it uses as much as digits as its factorization.

726368449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 49.

The square root of 726368449 is about 26951.2235158258. The cubic root of 726368449 is about 898.9157515098.

The spelling of 726368449 in words is "seven hundred twenty-six million, three hundred sixty-eight thousand, four hundred forty-nine".