1099559 has 2 divisors, whose sum is σ = 1099560. Its totient is φ = 1099558.

The previous prime is 1099547. The next prime is 1099573. The reversal of 1099559 is 9559901.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1099559 is a prime.

It is a Chen prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1099519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549779 + 549780.

It is an arithmetic number, because the mean of its divisors is an integer number (549780).

2^1099559 is an apocalyptic number.

1099559 is a deficient number, since it is larger than the sum of its proper divisors (1).

1099559 is an equidigital number, since it uses as much as digits as its factorization.

1099559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18225, while the sum is 38.

The square root of 1099559 is about 1048.5985885934. The cubic root of 1099559 is about 103.2142146856.

The spelling of 1099559 in words is "one million, ninety-nine thousand, five hundred fifty-nine".