731731243 has 4 divisors (see below), whose sum is σ = 734793120. Its totient is φ = 728669368.

The previous prime is 731731241. The next prime is 731731291. The reversal of 731731243 is 342137137.

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

It is a cyclic number.

It is not a de Polignac number, because 731731243 - 2¹ = 731731241 is a prime.

It is a super-2 number, since 2×731731243² = 1070861223964650098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (731731241) 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 3 ways as a sum of consecutive naturals, for example, 1530580 + ... + 1531057.

It is an arithmetic number, because the mean of its divisors is an integer number (183698280).

Almost surely, 2^731731243 is an apocalyptic number.

731731243 is a deficient number, since it is larger than the sum of its proper divisors (3061877).

731731243 is a wasteful number, since it uses less digits than its factorization.

731731243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3061876.

The product of its digits is 10584, while the sum is 31.

The square root of 731731243 is about 27050.5312886827. The cubic root of 731731243 is about 901.1225675552.

The spelling of 731731243 in words is "seven hundred thirty-one million, seven hundred thirty-one thousand, two hundred forty-three".