723480989 has 16 divisors (see below), whose sum is σ = 902952960. Its totient is φ = 563157360.

The previous prime is 723480959. The next prime is 723481001. The reversal of 723480989 is 989084327.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-723480989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723480929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77432 + ... + 86270.

It is an arithmetic number, because the mean of its divisors is an integer number (56434560).

Almost surely, 2^723480989 is an apocalyptic number.

It is an amenable number.

723480989 is a deficient number, since it is larger than the sum of its proper divisors (179471971).

723480989 is a wasteful number, since it uses less digits than its factorization.

723480989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9920.

The product of its (nonzero) digits is 870912, while the sum is 50.

The square root of 723480989 is about 26897.6019191303. The cubic root of 723480989 is about 897.7230463401.

The spelling of 723480989 in words is "seven hundred twenty-three million, four hundred eighty thousand, nine hundred eighty-nine".