11987894 has 4 divisors (see below), whose sum is σ = 17981844. Its totient is φ = 5993946.

The previous prime is 11987893. The next prime is 11987897. The reversal of 11987894 is 49878911.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11987891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2996972 + ... + 2996975.

It is an arithmetic number, because the mean of its divisors is an integer number (4495461).

Almost surely, 2^11987894 is an apocalyptic number.

11987894 is a deficient number, since it is larger than the sum of its proper divisors (5993950).

11987894 is an equidigital number, since it uses as much as digits as its factorization.

11987894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5993949.

The product of its digits is 145152, while the sum is 47.

The square root of 11987894 is about 3462.3538236292. The cubic root of 11987894 is about 228.8658342143.

The spelling of 11987894 in words is "eleven million, nine hundred eighty-seven thousand, eight hundred ninety-four".