720765085 has 4 divisors (see below), whose sum is σ = 864918108. Its totient is φ = 576612064.

The previous prime is 720765079. The next prime is 720765107. The reversal of 720765085 is 580567027.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 551921049 + 168844036 = 23493^2 + 12994^2 .

It is a cyclic number.

It is not a de Polignac number, because 720765085 - 2³ = 720765077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72076504 + ... + 72076513.

It is an arithmetic number, because the mean of its divisors is an integer number (216229527).

Almost surely, 2^720765085 is an apocalyptic number.

It is an amenable number.

720765085 is a deficient number, since it is larger than the sum of its proper divisors (144153023).

720765085 is a wasteful number, since it uses less digits than its factorization.

720765085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144153022.

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 720765085 is about 26847.0684619383. The cubic root of 720765085 is about 896.5983050352.

The spelling of 720765085 in words is "seven hundred twenty million, seven hundred sixty-five thousand, eighty-five".