724642889 has 8 divisors (see below), whose sum is σ = 729725952. Its totient is φ = 719578080.

The previous prime is 724642861. The next prime is 724642913. The reversal of 724642889 is 988246427.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-724642889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (724642819) 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 7 ways as a sum of consecutive naturals, for example, 80552 + ... + 89094.

It is an arithmetic number, because the mean of its divisors is an integer number (91215744).

Almost surely, 2^724642889 is an apocalyptic number.

It is an amenable number.

724642889 is a deficient number, since it is larger than the sum of its proper divisors (5083063).

724642889 is a wasteful number, since it uses less digits than its factorization.

724642889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9127.

The product of its digits is 1548288, while the sum is 50.

The square root of 724642889 is about 26919.1918340800. The cubic root of 724642889 is about 898.2033660439.

The spelling of 724642889 in words is "seven hundred twenty-four million, six hundred forty-two thousand, eight hundred eighty-nine".