722820609 has 36 divisors (see below), whose sum is σ = 1267358976. Its totient is φ = 395076528.

The previous prime is 722820601. The next prime is 722820613. The reversal of 722820609 is 906028227.

722820609 is a `hidden beast` number, since 7 + 2 + 28 + 20 + 609 = 666.

It is not a de Polignac number, because 722820609 - 2³ = 722820601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (722820601) 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 35 ways as a sum of consecutive naturals, for example, 25489 + ... + 45774.

It is an arithmetic number, because the mean of its divisors is an integer number (35204416).

Almost surely, 2^722820609 is an apocalyptic number.

It is an amenable number.

722820609 is a deficient number, since it is larger than the sum of its proper divisors (544538367).

722820609 is a wasteful number, since it uses less digits than its factorization.

722820609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71306 (or 71296 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 722820609 is about 26885.3233010131. The cubic root of 722820609 is about 897.4498215546.

The spelling of 722820609 in words is "seven hundred twenty-two million, eight hundred twenty thousand, six hundred nine".