11198931 has 4 divisors (see below), whose sum is σ = 14931912. Its totient is φ = 7465952.

The previous prime is 11198927. The next prime is 11198933. The reversal of 11198931 is 13989111.

It is a happy number.

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 11198931 - 2² = 11198927 is a prime.

It is a super-2 number, since 2×11198931² = 250832111085522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11198892 and 11198901.

It is not an unprimeable number, because it can be changed into a prime (11198933) 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 3 ways as a sum of consecutive naturals, for example, 1866486 + ... + 1866491.

It is an arithmetic number, because the mean of its divisors is an integer number (3732978).

Almost surely, 2^11198931 is an apocalyptic number.

11198931 is the 2117-th centered pentagonal number.

11198931 is a deficient number, since it is larger than the sum of its proper divisors (3732981).

11198931 is an equidigital number, since it uses as much as digits as its factorization.

11198931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3732980.

The product of its digits is 1944, while the sum is 33.

The square root of 11198931 is about 3346.4803899022. The cubic root of 11198931 is about 223.7306698655.

The spelling of 11198931 in words is "eleven million, one hundred ninety-eight thousand, nine hundred thirty-one".