1099289 has 2 divisors, whose sum is σ = 1099290. Its totient is φ = 1099288.

The previous prime is 1099279. The next prime is 1099309. The reversal of 1099289 is 9829901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1081600 + 17689 = 1040^2 + 133^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1099289 is a prime.

It is a Chen prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (1099249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549644 + 549645.

It is an arithmetic number, because the mean of its divisors is an integer number (549645).

2^1099289 is an apocalyptic number.

It is an amenable number.

1099289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1099289 is an equidigital number, since it uses as much as digits as its factorization.

1099289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 1099289 is about 1048.4698374298. The cubic root of 1099289 is about 103.2057658077.

It can be divided in two parts, 10 and 99289, that added together give a palindrome (99299).

The spelling of 1099289 in words is "one million, ninety-nine thousand, two hundred eighty-nine".