720220135 has 4 divisors (see below), whose sum is σ = 864264168. Its totient is φ = 576176104.

The previous prime is 720220093. The next prime is 720220157. The reversal of 720220135 is 531022027.

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

It is a cyclic number.

It is not a de Polignac number, because 720220135 - 2⁹ = 720219623 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, 72022009 + ... + 72022018.

It is an arithmetic number, because the mean of its divisors is an integer number (216066042).

Almost surely, 2^720220135 is an apocalyptic number.

720220135 is a deficient number, since it is larger than the sum of its proper divisors (144044033).

720220135 is a wasteful number, since it uses less digits than its factorization.

720220135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144044032.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 720220135 is about 26836.9173900431. The cubic root of 720220135 is about 896.3722838958.

The spelling of 720220135 in words is "seven hundred twenty million, two hundred twenty thousand, one hundred thirty-five".