1117889 has 2 divisors, whose sum is σ = 1117890. Its totient is φ = 1117888.

The previous prime is 1117877. The next prime is 1117901. The reversal of 1117889 is 9887111.

It is a balanced prime because it is at equal distance from previous prime (1117877) and next prime (1117901).

It can be written as a sum of positive squares in only one way, i.e., 748225 + 369664 = 865^2 + 608^2 .

It is a cyclic number.

It is not a de Polignac number, because 1117889 - 2¹² = 1113793 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 (1117819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558944 + 558945.

It is an arithmetic number, because the mean of its divisors is an integer number (558945).

2^1117889 is an apocalyptic number.

It is an amenable number.

1117889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1117889 is an equidigital number, since it uses as much as digits as its factorization.

1117889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 35.

The square root of 1117889 is about 1057.3027002708. The cubic root of 1117889 is about 103.7845948406.

It can be divided in two parts, 111 and 7889, that added together give a cube (8000 = 20³).

The spelling of 1117889 in words is "one million, one hundred seventeen thousand, eight hundred eighty-nine".