726723617 has 4 divisors (see below), whose sum is σ = 758320320. Its totient is φ = 695126916.

The previous prime is 726723593. The next prime is 726723629. The reversal of 726723617 is 716327627.

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, and also an emirpimes, since its reverse is a distinct semiprime: 716327627 = 2549 ⋅281023.

It is a cyclic number.

It is not a de Polignac number, because 726723617 - 2¹⁰ = 726722593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726723637) 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 in 3 ways as a sum of consecutive naturals, for example, 15798317 + ... + 15798362.

It is an arithmetic number, because the mean of its divisors is an integer number (189580080).

Almost surely, 2^726723617 is an apocalyptic number.

It is an amenable number.

726723617 is a deficient number, since it is larger than the sum of its proper divisors (31596703).

726723617 is a wasteful number, since it uses less digits than its factorization.

726723617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31596702.

The product of its digits is 148176, while the sum is 41.

The square root of 726723617 is about 26957.8117991798. The cubic root of 726723617 is about 899.0622401078.

The spelling of 726723617 in words is "seven hundred twenty-six million, seven hundred twenty-three thousand, six hundred seventeen".