11941999 has 4 divisors (see below), whose sum is σ = 11950864. Its totient is φ = 11933136.

The previous prime is 11941981. The next prime is 11942011. The reversal of 11941999 is 99914911.

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.

It is a cyclic number.

It is not a de Polignac number, because 11941999 - 2¹³ = 11933807 is a prime.

It is a super-2 number, since 2×11941999² = 285222680232002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11941199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1947 + ... + 5260.

It is an arithmetic number, because the mean of its divisors is an integer number (2987716).

Almost surely, 2^11941999 is an apocalyptic number.

11941999 is a deficient number, since it is larger than the sum of its proper divisors (8865).

11941999 is an equidigital number, since it uses as much as digits as its factorization.

11941999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8864.

The product of its digits is 26244, while the sum is 43.

The square root of 11941999 is about 3455.7197513687. The cubic root of 11941999 is about 228.5733939005.

The spelling of 11941999 in words is "eleven million, nine hundred forty-one thousand, nine hundred ninety-nine".