11198905 has 8 divisors (see below), whose sum is σ = 13872384. Its totient is φ = 8670000.

The previous prime is 11198899. The next prime is 11198909. The reversal of 11198905 is 50989111.

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

It is not a de Polignac number, because 11198905 - 2¹⁵ = 11166137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11198909) by changing a digit.

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, 35971 + ... + 36280.

It is an arithmetic number, because the mean of its divisors is an integer number (1734048).

Almost surely, 2^11198905 is an apocalyptic number.

It is an amenable number.

11198905 is a deficient number, since it is larger than the sum of its proper divisors (2673479).

11198905 is an equidigital number, since it uses as much as digits as its factorization.

11198905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72287.

The product of its (nonzero) digits is 3240, while the sum is 34.

The square root of 11198905 is about 3346.4765052216. The cubic root of 11198905 is about 223.7304967239.

It can be divided in two parts, 11 and 198905, that added together give a square (198916 = 446²).

The spelling of 11198905 in words is "eleven million, one hundred ninety-eight thousand, nine hundred five".