726637231 has 8 divisors (see below), whose sum is σ = 732985344. Its totient is φ = 720299160.

The previous prime is 726637213. The next prime is 726637237. The reversal of 726637231 is 132736627.

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 726637231 - 2¹³ = 726629039 is a prime.

It is a super-2 number, since 2×726637231² = 1056003330950694722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726637237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243756 + ... + 246718.

It is an arithmetic number, because the mean of its divisors is an integer number (91623168).

Almost surely, 2^726637231 is an apocalyptic number.

726637231 is a deficient number, since it is larger than the sum of its proper divisors (6348113).

726637231 is a wasteful number, since it uses less digits than its factorization.

726637231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5021.

The product of its digits is 63504, while the sum is 37.

The square root of 726637231 is about 26956.2095072731. The cubic root of 726637231 is about 899.0266147033.

The spelling of 726637231 in words is "seven hundred twenty-six million, six hundred thirty-seven thousand, two hundred thirty-one".