1098959 has 4 divisors (see below), whose sum is σ = 1107480. Its totient is φ = 1090440.

The previous prime is 1098953. The next prime is 1098967. The reversal of 1098959 is 9598901.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1098959 - 2¹⁶ = 1033423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4064 + ... + 4325.

It is an arithmetic number, because the mean of its divisors is an integer number (276870).

2^1098959 is an apocalyptic number.

1098959 is a deficient number, since it is larger than the sum of its proper divisors (8521).

1098959 is an equidigital number, since it uses as much as digits as its factorization.

1098959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8520.

The product of its (nonzero) digits is 29160, while the sum is 41.

The square root of 1098959 is about 1048.3124534222. The cubic root of 1098959 is about 103.1954375224.

The spelling of 1098959 in words is "one million, ninety-eight thousand, nine hundred fifty-nine".