726220801 has 2 divisors, whose sum is σ = 726220802. Its totient is φ = 726220800.

The previous prime is 726220783. The next prime is 726220843. The reversal of 726220801 is 108022627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 694849600 + 31371201 = 26360^2 + 5601^2 .

It is an emirp because it is prime and its reverse (108022627) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 726220801 - 2⁵ = 726220769 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 726220801.

It is not a weakly prime, because it can be changed into another prime (726221801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363110400 + 363110401.

It is an arithmetic number, because the mean of its divisors is an integer number (363110401).

Almost surely, 2^726220801 is an apocalyptic number.

It is an amenable number.

726220801 is a deficient number, since it is larger than the sum of its proper divisors (1).

726220801 is an equidigital number, since it uses as much as digits as its factorization.

726220801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 726220801 is about 26948.4842059809. The cubic root of 726220801 is about 898.8548402248.

The spelling of 726220801 in words is "seven hundred twenty-six million, two hundred twenty thousand, eight hundred one".