1147889 has 2 divisors, whose sum is σ = 1147890. Its totient is φ = 1147888.

The previous prime is 1147843. The next prime is 1147897. The reversal of 1147889 is 9887411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 960400 + 187489 = 980^2 + 433^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1147889 is a prime.

It is a Chen prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (1147819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 573944 + 573945.

It is an arithmetic number, because the mean of its divisors is an integer number (573945).

2^1147889 is an apocalyptic number.

It is an amenable number.

1147889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1147889 is an equidigital number, since it uses as much as digits as its factorization.

1147889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 38.

The square root of 1147889 is about 1071.3958185470. The cubic root of 1147889 is about 104.7048095979.

The spelling of 1147889 in words is "one million, one hundred forty-seven thousand, eight hundred eighty-nine".