720868801 has 3 divisors (see below), whose sum is σ = 720895651. Its totient is φ = 720841952.

The previous prime is 720868793. The next prime is 720868807. The reversal of 720868801 is 108868027.

The square root of 720868801 is 26849.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 197374401 + 523494400 = 14049^2 + 22880^2 .

It is not a de Polignac number, because 720868801 - 2³ = 720868793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720868807) 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 2 ways as a sum of consecutive naturals, for example, 13425 + ... + 40273.

Almost surely, 2^720868801 is an apocalyptic number.

720868801 is the 26849-th square number.

720868801 is the 13425-th centered octagonal number.

It is an amenable number.

720868801 is a deficient number, since it is larger than the sum of its proper divisors (26850).

720868801 is an frugal number, since it uses more digits than its factorization.

720868801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53698 (or 26849 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 40.

The cubic root of 720868801 is about 896.6413089356.

The spelling of 720868801 in words is "seven hundred twenty million, eight hundred sixty-eight thousand, eight hundred one".