11997994 has 8 divisors (see below), whose sum is σ = 18436068. Its totient is φ = 5852640.

The previous prime is 11997991. The next prime is 11998009. The reversal of 11997994 is 49979911.

It is a happy number.

11997994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11992369 + 5625 = 3463^2 + 75^2 .

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

It is not an unprimeable number, because it can be changed into a prime (11997991) 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, 73077 + ... + 73240.

Almost surely, 2^11997994 is an apocalyptic number.

11997994 is a deficient number, since it is larger than the sum of its proper divisors (6438074).

11997994 is a wasteful number, since it uses less digits than its factorization.

11997994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146360.

The product of its digits is 183708, while the sum is 49.

The square root of 11997994 is about 3463.8120618763. The cubic root of 11997994 is about 228.9300905955.

The spelling of 11997994 in words is "eleven million, nine hundred ninety-seven thousand, nine hundred ninety-four".