11299991 has 4 divisors (see below), whose sum is σ = 11308584. Its totient is φ = 11291400.

The previous prime is 11299979. The next prime is 11299993. The reversal of 11299991 is 19999211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 19999211 = 109 ⋅183479.

It is a cyclic number.

It is not a de Polignac number, because 11299991 - 2¹⁴ = 11283607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11299993) 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, 1865 + ... + 5106.

It is an arithmetic number, because the mean of its divisors is an integer number (2827146).

Almost surely, 2^11299991 is an apocalyptic number.

11299991 is a deficient number, since it is larger than the sum of its proper divisors (8593).

11299991 is an equidigital number, since it uses as much as digits as its factorization.

11299991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8592.

The product of its digits is 13122, while the sum is 41.

The square root of 11299991 is about 3361.5459241248. The cubic root of 11299991 is about 224.4016430835.

The spelling of 11299991 in words is "eleven million, two hundred ninety-nine thousand, nine hundred ninety-one".