720656969 has 8 divisors (see below), whose sum is σ = 759733248. Its totient is φ = 682570080.

The previous prime is 720656933. The next prime is 720656977. The reversal of 720656969 is 969656027.

720656969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 720656969 - 2¹² = 720652873 is a prime.

It is a super-2 number, since 2×720656969² = 1038692933936533922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720656369) 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, 245852 + ... + 248765.

It is an arithmetic number, because the mean of its divisors is an integer number (94966656).

Almost surely, 2^720656969 is an apocalyptic number.

It is an amenable number.

720656969 is a deficient number, since it is larger than the sum of its proper divisors (39076279).

720656969 is a wasteful number, since it uses less digits than its factorization.

720656969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494695.

The product of its (nonzero) digits is 1224720, while the sum is 50.

The square root of 720656969 is about 26845.0548332463. The cubic root of 720656969 is about 896.5534723652.

The spelling of 720656969 in words is "seven hundred twenty million, six hundred fifty-six thousand, nine hundred sixty-nine".