723441609 has 24 divisors (see below), whose sum is σ = 1189536192. Its totient is φ = 419385120.

The previous prime is 723441601. The next prime is 723441623. The reversal of 723441609 is 906144327.

723441609 is a `hidden beast` number, since 7 + 2 + 3 + 4 + 41 + 609 = 666.

It is not a de Polignac number, because 723441609 - 2³ = 723441601 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (723441601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 156582 + ... + 161135.

It is an arithmetic number, because the mean of its divisors is an integer number (49564008).

Almost surely, 2^723441609 is an apocalyptic number.

It is an amenable number.

723441609 is a deficient number, since it is larger than the sum of its proper divisors (466094583).

723441609 is a wasteful number, since it uses less digits than its factorization.

723441609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317757 (or 317754 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 723441609 is about 26896.8698736489. The cubic root of 723441609 is about 897.7067579715.

The spelling of 723441609 in words is "seven hundred twenty-three million, four hundred forty-one thousand, six hundred nine".