11171998 has 16 divisors (see below), whose sum is σ = 17068896. Its totient is φ = 5483520.

The previous prime is 11171987. The next prime is 11172001. The reversal of 11171998 is 89917111.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39618 + ... + 39898.

It is an arithmetic number, because the mean of its divisors is an integer number (1066806).

Almost surely, 2^11171998 is an apocalyptic number.

11171998 is a deficient number, since it is larger than the sum of its proper divisors (5896898).

11171998 is a wasteful number, since it uses less digits than its factorization.

11171998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579.

The product of its digits is 4536, while the sum is 37.

The square root of 11171998 is about 3342.4538889864. The cubic root of 11171998 is about 223.5511713297.

The spelling of 11171998 in words is "eleven million, one hundred seventy-one thousand, nine hundred ninety-eight".