11891799 has 16 divisors (see below), whose sum is σ = 17994240. Its totient is φ = 7758360.

The previous prime is 11891797. The next prime is 11891801. The reversal of 11891799 is 99719811.

11891799 is nontrivially palindromic in base 12.

It is an interprime number because it is at equal distance from previous prime (11891797) and next prime (11891801).

It is not a de Polignac number, because 11891799 - 2¹ = 11891797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11891797) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3417 + ... + 5954.

It is an arithmetic number, because the mean of its divisors is an integer number (1124640).

Almost surely, 2^11891799 is an apocalyptic number.

11891799 is a deficient number, since it is larger than the sum of its proper divisors (6102441).

11891799 is an equidigital number, since it uses as much as digits as its factorization.

11891799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9427 (or 9421 counting only the distinct ones).

The product of its digits is 40824, while the sum is 45.

The square root of 11891799 is about 3448.4487816988. The cubic root of 11891799 is about 228.2526631158.

The spelling of 11891799 in words is "eleven million, eight hundred ninety-one thousand, seven hundred ninety-nine".