731189 has 2 divisors, whose sum is σ = 731190. Its totient is φ = 731188.

The previous prime is 731183. The next prime is 731191. The reversal of 731189 is 981137.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 550564 + 180625 = 742^2 + 425^2 .

It is an emirp because it is prime and its reverse (981137) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 731189 - 2⁴ = 731173 is a prime.

Together with 731191, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (731183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365594 + 365595.

It is an arithmetic number, because the mean of its divisors is an integer number (365595).

2⁷³¹¹⁸⁹ is an apocalyptic number.

It is an amenable number.

731189 is a deficient number, since it is larger than the sum of its proper divisors (1).

731189 is an equidigital number, since it uses as much as digits as its factorization.

731189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 29.

The square root of 731189 is about 855.0959010544. The cubic root of 731189 is about 90.0899922900.

The spelling of 731189 in words is "seven hundred thirty-one thousand, one hundred eighty-nine".