720503801 has 4 divisors (see below), whose sum is σ = 727637604. Its totient is φ = 713370000.

The previous prime is 720503747. The next prime is 720503851. The reversal of 720503801 is 108305027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 108305027 = 101 ⋅1072327.

It can be written as a sum of positive squares in 2 ways, for example, as 521665600 + 198838201 = 22840^2 + 14101^2 .

It is a cyclic number.

It is not a de Polignac number, because 720503801 - 2⁶ = 720503737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720503851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3566750 + ... + 3566951.

It is an arithmetic number, because the mean of its divisors is an integer number (181909401).

Almost surely, 2^720503801 is an apocalyptic number.

It is an amenable number.

720503801 is a deficient number, since it is larger than the sum of its proper divisors (7133803).

720503801 is a wasteful number, since it uses less digits than its factorization.

720503801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7133802.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 720503801 is about 26842.2018657188. The cubic root of 720503801 is about 896.4899502189.

Adding to 720503801 its reverse (108305027), we get a palindrome (828808828).

The spelling of 720503801 in words is "seven hundred twenty million, five hundred three thousand, eight hundred one".