726972005 has 8 divisors (see below), whose sum is σ = 878734872. Its totient is φ = 577331968.

The previous prime is 726971989. The next prime is 726972007. The reversal of 726972005 is 500279627.

It can be written as a sum of positive squares in 4 ways, for example, as 296907361 + 430064644 = 17231^2 + 20738^2 .

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 726972005 - 2⁴ = 726971989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 726972005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726972007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 529952 + ... + 531321.

It is an arithmetic number, because the mean of its divisors is an integer number (109841859).

Almost surely, 2^726972005 is an apocalyptic number.

It is an amenable number.

726972005 is a deficient number, since it is larger than the sum of its proper divisors (151762867).

726972005 is a wasteful number, since it uses less digits than its factorization.

726972005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061415.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 726972005 is about 26962.4183818885. The cubic root of 726972005 is about 899.1646590691.

The spelling of 726972005 in words is "seven hundred twenty-six million, nine hundred seventy-two thousand, five".