726261217 has 4 divisors (see below), whose sum is σ = 792284976. Its totient is φ = 660237460.

The previous prime is 726261163. The next prime is 726261241. The reversal of 726261217 is 712162627.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 726261217 - 2⁷ = 726261089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726261247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33011863 + ... + 33011884.

It is an arithmetic number, because the mean of its divisors is an integer number (198071244).

Almost surely, 2^726261217 is an apocalyptic number.

It is an amenable number.

726261217 is a deficient number, since it is larger than the sum of its proper divisors (66023759).

726261217 is a wasteful number, since it uses less digits than its factorization.

726261217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66023758.

The product of its digits is 14112, while the sum is 34.

The square root of 726261217 is about 26949.2340707487. The cubic root of 726261217 is about 898.8715144205.

The spelling of 726261217 in words is "seven hundred twenty-six million, two hundred sixty-one thousand, two hundred seventeen".