726622621 has 8 divisors (see below), whose sum is σ = 729861120. Its totient is φ = 723391872.

The previous prime is 726622597. The next prime is 726622651. The reversal of 726622621 is 126226627.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 726622621 - 2⁷ = 726622493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726622651) 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 7 ways as a sum of consecutive naturals, for example, 256350 + ... + 259168.

It is an arithmetic number, because the mean of its divisors is an integer number (91232640).

Almost surely, 2^726622621 is an apocalyptic number.

It is an amenable number.

726622621 is a deficient number, since it is larger than the sum of its proper divisors (3238499).

726622621 is a wasteful number, since it uses less digits than its factorization.

726622621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3875.

The product of its digits is 24192, while the sum is 34.

The square root of 726622621 is about 26955.9385108365. The cubic root of 726622621 is about 899.0205892910.

The spelling of 726622621 in words is "seven hundred twenty-six million, six hundred twenty-two thousand, six hundred twenty-one".