726767287 has 4 divisors (see below), whose sum is σ = 731396536. Its totient is φ = 722138040.

The previous prime is 726767263. The next prime is 726767329. The reversal of 726767287 is 782767627.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-726767287 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 (726767207) 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, 2314389 + ... + 2314702.

It is an arithmetic number, because the mean of its divisors is an integer number (182849134).

Almost surely, 2^726767287 is an apocalyptic number.

726767287 is a deficient number, since it is larger than the sum of its proper divisors (4629249).

726767287 is a wasteful number, since it uses less digits than its factorization.

726767287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4629248.

The product of its digits is 2765952, while the sum is 52.

The square root of 726767287 is about 26958.6217563139. The cubic root of 726767287 is about 899.0802484495.

The spelling of 726767287 in words is "seven hundred twenty-six million, seven hundred sixty-seven thousand, two hundred eighty-seven".