731287973 has 4 divisors (see below), whose sum is σ = 787540908. Its totient is φ = 675035040.

The previous prime is 731287961. The next prime is 731287987. The reversal of 731287973 is 379782137.

731287973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 136025569 + 595262404 = 11663^2 + 24398^2 .

It is a cyclic number.

It is not a de Polignac number, because 731287973 - 2¹⁸ = 731025829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731287673) 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, 28126448 + ... + 28126473.

It is an arithmetic number, because the mean of its divisors is an integer number (196885227).

Almost surely, 2^731287973 is an apocalyptic number.

It is an amenable number.

731287973 is a deficient number, since it is larger than the sum of its proper divisors (56252935).

731287973 is a wasteful number, since it uses less digits than its factorization.

731287973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56252934.

The product of its digits is 444528, while the sum is 47.

The square root of 731287973 is about 27042.3366778834. The cubic root of 731287973 is about 900.9405693650.

The spelling of 731287973 in words is "seven hundred thirty-one million, two hundred eighty-seven thousand, nine hundred seventy-three".