11901986 has 8 divisors (see below), whose sum is σ = 17889984. Its totient is φ = 5938660.

The previous prime is 11901979. The next prime is 11902001. The reversal of 11901986 is 68910911.

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

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4910 + ... + 6921.

It is an arithmetic number, because the mean of its divisors is an integer number (2236248).

Almost surely, 2^11901986 is an apocalyptic number.

11901986 is a deficient number, since it is larger than the sum of its proper divisors (5987998).

11901986 is a wasteful number, since it uses less digits than its factorization.

11901986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12336.

The product of its (nonzero) digits is 3888, while the sum is 35.

The square root of 11901986 is about 3449.9255064421. The cubic root of 11901986 is about 228.3178213602.

The spelling of 11901986 in words is "eleven million, nine hundred one thousand, nine hundred eighty-six".