11509898 has 8 divisors (see below), whose sum is σ = 17317092. Its totient is φ = 5737536.

The previous prime is 11509871. The next prime is 11509909. The reversal of 11509898 is 89890511.

It can be written as a sum of positive squares in 2 ways, for example, as 11242609 + 267289 = 3353^2 + 517^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7865 + ... + 9212.

Almost surely, 2^11509898 is an apocalyptic number.

11509898 is a deficient number, since it is larger than the sum of its proper divisors (5807194).

11509898 is a wasteful number, since it uses less digits than its factorization.

11509898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17416.

The product of its (nonzero) digits is 25920, while the sum is 41.

The square root of 11509898 is about 3392.6240581591. The cubic root of 11509898 is about 225.7826113338.

The spelling of 11509898 in words is "eleven million, five hundred nine thousand, eight hundred ninety-eight".