731243 has 2 divisors, whose sum is σ = 731244. Its totient is φ = 731242.

The previous prime is 731233. The next prime is 731249. The reversal of 731243 is 342137.

731243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 731243 - 2¹⁸ = 469099 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (731249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365621 + 365622.

It is an arithmetic number, because the mean of its divisors is an integer number (365622).

2⁷³¹²⁴³ is an apocalyptic number.

731243 is a deficient number, since it is larger than the sum of its proper divisors (1).

731243 is an equidigital number, since it uses as much as digits as its factorization.

731243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 20.

The square root of 731243 is about 855.1274758771. The cubic root of 731243 is about 90.0922100202.

The spelling of 731243 in words is "seven hundred thirty-one thousand, two hundred forty-three".