726356997 has 64 divisors (see below), whose sum is σ = 1185062400. Its totient is φ = 438197760.

The previous prime is 726356993. The next prime is 726357007. The reversal of 726356997 is 799653627.

726356997 is a `hidden beast` number, since 72 + 6 + 3 + 569 + 9 + 7 = 666.

It is not a de Polignac number, because 726356997 - 2² = 726356993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726356993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 954097 + ... + 954857.

It is an arithmetic number, because the mean of its divisors is an integer number (18516600).

Almost surely, 2^726356997 is an apocalyptic number.

It is an amenable number.

726356997 is a deficient number, since it is larger than the sum of its proper divisors (458705403).

726356997 is a wasteful number, since it uses less digits than its factorization.

726356997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875 (or 869 counting only the distinct ones).

The product of its digits is 4286520, while the sum is 54.

The square root of 726356997 is about 26951.0110571014. The cubic root of 726356997 is about 898.9110273521.

The spelling of 726356997 in words is "seven hundred twenty-six million, three hundred fifty-six thousand, nine hundred ninety-seven".