720756089 has 16 divisors (see below), whose sum is σ = 805049280. Its totient is φ = 641272320.

The previous prime is 720756079. The next prime is 720756103. The reversal of 720756089 is 980657027.

It is a cyclic number.

It is not a de Polignac number, because 720756089 - 2²⁸ = 452320633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (720756019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166142 + ... + 170424.

It is an arithmetic number, because the mean of its divisors is an integer number (50315580).

Almost surely, 2^720756089 is an apocalyptic number.

It is an amenable number.

720756089 is a deficient number, since it is larger than the sum of its proper divisors (84293191).

720756089 is a wasteful number, since it uses less digits than its factorization.

720756089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4840.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 720756089 is about 26846.9009198455. The cubic root of 720756089 is about 896.5945748175.

The spelling of 720756089 in words is "seven hundred twenty million, seven hundred fifty-six thousand, eighty-nine".