720302641 has 4 divisors (see below), whose sum is σ = 720590884. Its totient is φ = 720014400.

The previous prime is 720302633. The next prime is 720302647. The reversal of 720302641 is 146203027.

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 129618225 + 590684416 = 11385^2 + 24304^2 .

It is a cyclic number.

It is not a de Polignac number, because 720302641 - 2³ = 720302633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720302647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140340 + ... + 145381.

It is an arithmetic number, because the mean of its divisors is an integer number (180147721).

Almost surely, 2^720302641 is an apocalyptic number.

It is an amenable number.

720302641 is a deficient number, since it is larger than the sum of its proper divisors (288243).

720302641 is a wasteful number, since it uses less digits than its factorization.

720302641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288242.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 720302641 is about 26838.4545195881. The cubic root of 720302641 is about 896.4065110550.

Adding to 720302641 its reverse (146203027), we get a palindrome (866505668).

The spelling of 720302641 in words is "seven hundred twenty million, three hundred two thousand, six hundred forty-one".