720868802 has 4 divisors (see below), whose sum is σ = 1081303206. Its totient is φ = 360434400.

The previous prime is 720868793. The next prime is 720868807. The reversal of 720868802 is 208868027.

It is a Cunningham number, because it is equal to 26849²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 208868027 = 181 ⋅1153967.

It can be written as a sum of positive squares in only one way, i.e., 720868801 + 1 = 26849^2 + 1^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 720868802.

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 as a sum of consecutive naturals, namely, 180217199 + ... + 180217202.

Almost surely, 2^720868802 is an apocalyptic number.

720868802 is a deficient number, since it is larger than the sum of its proper divisors (360434404).

720868802 is a wasteful number, since it uses less digits than its factorization.

720868802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360434403.

The product of its (nonzero) digits is 86016, while the sum is 41.

The square root of 720868802 is about 26849.0000186227. Note that the first 4 decimals coincide. The cubic root of 720868802 is about 896.6413093502.

The spelling of 720868802 in words is "seven hundred twenty million, eight hundred sixty-eight thousand, eight hundred two".