720734761 has 8 divisors (see below), whose sum is σ = 727704864. Its totient is φ = 713798400.

The previous prime is 720734753. The next prime is 720734789. The reversal of 720734761 is 167437027.

720734761 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 720734761 - 2³ = 720734753 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 720734761.

It is not an unprimeable number, because it can be changed into a prime (720734731) 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, 35586 + ... + 52036.

It is an arithmetic number, because the mean of its divisors is an integer number (90963108).

Almost surely, 2^720734761 is an apocalyptic number.

It is an amenable number.

720734761 is a deficient number, since it is larger than the sum of its proper divisors (6970103).

720734761 is a wasteful number, since it uses less digits than its factorization.

720734761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16871.

The product of its (nonzero) digits is 49392, while the sum is 37.

The square root of 720734761 is about 26846.5037015996. The cubic root of 720734761 is about 896.5857309761.

The spelling of 720734761 in words is "seven hundred twenty million, seven hundred thirty-four thousand, seven hundred sixty-one".