723545489 has 4 divisors (see below), whose sum is σ = 725454960. Its totient is φ = 721636020.

The previous prime is 723545399. The next prime is 723545533. The reversal of 723545489 is 984545327.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 723545489 - 2¹² = 723541393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (723545189) 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, 954167 + ... + 954924.

It is an arithmetic number, because the mean of its divisors is an integer number (181363740).

Almost surely, 2^723545489 is an apocalyptic number.

It is an amenable number.

723545489 is a deficient number, since it is larger than the sum of its proper divisors (1909471).

723545489 is a wasteful number, since it uses less digits than its factorization.

723545489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1909470.

The product of its digits is 1209600, while the sum is 47.

The square root of 723545489 is about 26898.8008840543. The cubic root of 723545489 is about 897.7497235745.

The spelling of 723545489 in words is "seven hundred twenty-three million, five hundred forty-five thousand, four hundred eighty-nine".