1149989 has 2 divisors, whose sum is σ = 1149990. Its totient is φ = 1149988.

The previous prime is 1149983. The next prime is 1149991. The reversal of 1149989 is 9899411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1119364 + 30625 = 1058^2 + 175^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1149989 is a prime.

Together with 1149991, 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 (1149983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 574994 + 574995.

It is an arithmetic number, because the mean of its divisors is an integer number (574995).

2^1149989 is an apocalyptic number.

It is an amenable number.

1149989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1149989 is an equidigital number, since it uses as much as digits as its factorization.

1149989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 41.

The square root of 1149989 is about 1072.3754006877. The cubic root of 1149989 is about 104.7686212702.

The spelling of 1149989 in words is "one million, one hundred forty-nine thousand, nine hundred eighty-nine".