1147189 has 2 divisors, whose sum is σ = 1147190. Its totient is φ = 1147188.

The previous prime is 1147187. The next prime is 1147193. The reversal of 1147189 is 9817411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1030225 + 116964 = 1015^2 + 342^2 .

It is an emirp because it is prime and its reverse (9817411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1147189 - 2¹ = 1147187 is a prime.

Together with 1147187, it forms a pair of twin primes.

1147189 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1147189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1147183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 573594 + 573595.

It is an arithmetic number, because the mean of its divisors is an integer number (573595).

2^1147189 is an apocalyptic number.

It is an amenable number.

1147189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1147189 is an equidigital number, since it uses as much as digits as its factorization.

1147189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 31.

The square root of 1147189 is about 1071.0690920758. The cubic root of 1147189 is about 104.6835217468.

The spelling of 1147189 in words is "one million, one hundred forty-seven thousand, one hundred eighty-nine".