720938569 has 8 divisors (see below), whose sum is σ = 780420872. Its totient is φ = 662031360.

The previous prime is 720938557. The next prime is 720938587. The reversal of 720938569 is 965839027.

720938569 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 8048569 + 712890000 = 2837^2 + 26700^2 .

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 720938569 - 2²³ = 712549961 is a prime.

It is a super-2 number, since 2×720938569² = 1039504840543535522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720938539) 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, 141162 + ... + 146179.

It is an arithmetic number, because the mean of its divisors is an integer number (97552609).

Almost surely, 2^720938569 is an apocalyptic number.

It is an amenable number.

720938569 is a deficient number, since it is larger than the sum of its proper divisors (59482303).

720938569 is a wasteful number, since it uses less digits than its factorization.

720938569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287547.

The product of its (nonzero) digits is 816480, while the sum is 49.

The square root of 720938569 is about 26850.2992348316. The cubic root of 720938569 is about 896.6702346119.

The spelling of 720938569 in words is "seven hundred twenty million, nine hundred thirty-eight thousand, five hundred sixty-nine".