11899911 has 8 divisors (see below), whose sum is σ = 15899760. Its totient is φ = 7916672.

The previous prime is 11899897. The next prime is 11899913. The reversal of 11899911 is 11999811.

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

It is a cyclic number.

It is not a de Polignac number, because 11899911 - 2⁵ = 11899879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11899911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11899913) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2370 + ... + 5423.

It is an arithmetic number, because the mean of its divisors is an integer number (1987470).

Almost surely, 2^11899911 is an apocalyptic number.

11899911 is a deficient number, since it is larger than the sum of its proper divisors (3999849).

11899911 is an equidigital number, since it uses as much as digits as its factorization.

11899911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8305.

The product of its digits is 5832, while the sum is 39.

The square root of 11899911 is about 3449.6247622024. The cubic root of 11899911 is about 228.3045522298.

The spelling of 11899911 in words is "eleven million, eight hundred ninety-nine thousand, nine hundred eleven".