726656573 has 4 divisors (see below), whose sum is σ = 726774048. Its totient is φ = 726539100.

The previous prime is 726656569. The next prime is 726656591. The reversal of 726656573 is 375656627.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 375656627 = 7603 ⋅49409.

It is a cyclic number.

It is not a de Polignac number, because 726656573 - 2² = 726656569 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 (726656543) 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 3 ways as a sum of consecutive naturals, for example, 48911 + ... + 62012.

It is an arithmetic number, because the mean of its divisors is an integer number (181693512).

Almost surely, 2^726656573 is an apocalyptic number.

It is an amenable number.

726656573 is a deficient number, since it is larger than the sum of its proper divisors (117475).

726656573 is a wasteful number, since it uses less digits than its factorization.

726656573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117474.

The product of its digits is 1587600, while the sum is 47.

The square root of 726656573 is about 26956.5682719444. The cubic root of 726656573 is about 899.0345915487.

The spelling of 726656573 in words is "seven hundred twenty-six million, six hundred fifty-six thousand, five hundred seventy-three".