726269991 has 8 divisors (see below), whose sum is σ = 988963584. Its totient is φ = 473878200.

The previous prime is 726269987. The next prime is 726270007. The reversal of 726269991 is 199962627.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 726269991 - 2² = 726269987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726269981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2575285 + ... + 2575566.

It is an arithmetic number, because the mean of its divisors is an integer number (123620448).

Almost surely, 2^726269991 is an apocalyptic number.

726269991 is a deficient number, since it is larger than the sum of its proper divisors (262693593).

726269991 is a wasteful number, since it uses less digits than its factorization.

726269991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5150901.

The product of its digits is 734832, while the sum is 51.

The square root of 726269991 is about 26949.3968578148. The cubic root of 726269991 is about 898.8751341773.

The spelling of 726269991 in words is "seven hundred twenty-six million, two hundred sixty-nine thousand, nine hundred ninety-one".