721803412 has 12 divisors (see below), whose sum is σ = 1377988416. Its totient is φ = 328092440.

The previous prime is 721803403. The next prime is 721803413. The reversal of 721803412 is 214308127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721803413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8202268 + ... + 8202355.

It is an arithmetic number, because the mean of its divisors is an integer number (114832368).

Almost surely, 2^721803412 is an apocalyptic number.

It is an amenable number.

721803412 is a deficient number, since it is larger than the sum of its proper divisors (656185004).

721803412 is a wasteful number, since it uses less digits than its factorization.

721803412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16404638 (or 16404636 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 721803412 is about 26866.3993121520. The cubic root of 721803412 is about 897.0286419832.

The spelling of 721803412 in words is "seven hundred twenty-one million, eight hundred three thousand, four hundred twelve".