731056489 has 4 divisors (see below), whose sum is σ = 732046480. Its totient is φ = 730066500.

The previous prime is 731056481. The next prime is 731056531. The reversal of 731056489 is 984650137.

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 731056489 - 2³ = 731056481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (731056481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 493887 + ... + 495364.

It is an arithmetic number, because the mean of its divisors is an integer number (183011620).

Almost surely, 2^731056489 is an apocalyptic number.

It is an amenable number.

731056489 is a deficient number, since it is larger than the sum of its proper divisors (989991).

731056489 is an equidigital number, since it uses as much as digits as its factorization.

731056489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989990.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 731056489 is about 27038.0563095797. The cubic root of 731056489 is about 900.8454972258.

The spelling of 731056489 in words is "seven hundred thirty-one million, fifty-six thousand, four hundred eighty-nine".