726243637 has 4 divisors (see below), whose sum is σ = 829992736. Its totient is φ = 622494540.

The previous prime is 726243601. The next prime is 726243667. The reversal of 726243637 is 736342627.

726243637 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 736342627 = 191 ⋅3855197.

It is a cyclic number.

It is not a de Polignac number, because 726243637 - 2⁷ = 726243509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 726243637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726243667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51874539 + ... + 51874552.

It is an arithmetic number, because the mean of its divisors is an integer number (207498184).

Almost surely, 2^726243637 is an apocalyptic number.

It is an amenable number.

726243637 is a deficient number, since it is larger than the sum of its proper divisors (103749099).

726243637 is a wasteful number, since it uses less digits than its factorization.

726243637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103749098.

The product of its digits is 254016, while the sum is 40.

The square root of 726243637 is about 26948.9078999502. The cubic root of 726243637 is about 898.8642616175.

The spelling of 726243637 in words is "seven hundred twenty-six million, two hundred forty-three thousand, six hundred thirty-seven".