731342305 has 8 divisors (see below), whose sum is σ = 884017512. Its totient is φ = 580802688.

The previous prime is 731342303. The next prime is 731342309. The reversal of 731342305 is 503243137.

It can be written as a sum of positive squares in 4 ways, for example, as 223831521 + 507510784 = 14961^2 + 22528^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 731342305 - 2¹ = 731342303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (731342303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 533142 + ... + 534511.

It is an arithmetic number, because the mean of its divisors is an integer number (110502189).

Almost surely, 2^731342305 is an apocalyptic number.

It is an amenable number.

731342305 is a deficient number, since it is larger than the sum of its proper divisors (152675207).

731342305 is a wasteful number, since it uses less digits than its factorization.

731342305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067795.

The product of its (nonzero) digits is 7560, while the sum is 28.

The square root of 731342305 is about 27043.3412321777. The cubic root of 731342305 is about 900.9628809999.

The spelling of 731342305 in words is "seven hundred thirty-one million, three hundred forty-two thousand, three hundred five".