726639351 has 16 divisors (see below), whose sum is σ = 993366528. Its totient is φ = 472190400.

The previous prime is 726639323. The next prime is 726639359. The reversal of 726639351 is 153936627.

It is not a de Polignac number, because 726639351 - 2¹³ = 726631159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726639359) 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 15 ways as a sum of consecutive naturals, for example, 198306 + ... + 201936.

It is an arithmetic number, because the mean of its divisors is an integer number (62085408).

Almost surely, 2^726639351 is an apocalyptic number.

726639351 is a deficient number, since it is larger than the sum of its proper divisors (266727177).

726639351 is a wasteful number, since it uses less digits than its factorization.

726639351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5302.

The product of its digits is 204120, while the sum is 42.

The square root of 726639351 is about 26956.2488302805. The cubic root of 726639351 is about 899.0274890207.

The spelling of 726639351 in words is "seven hundred twenty-six million, six hundred thirty-nine thousand, three hundred fifty-one".