11969985 has 16 divisors (see below), whose sum is σ = 19293120. Its totient is φ = 6336960.

The previous prime is 11969963. The next prime is 11969987. The reversal of 11969985 is 58996911.

11969985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11969985 - 2⁷ = 11969857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11969987) 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, 786 + ... + 4955.

It is an arithmetic number, because the mean of its divisors is an integer number (1205820).

Almost surely, 2^11969985 is an apocalyptic number.

11969985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11969985 is a deficient number, since it is larger than the sum of its proper divisors (7323135).

11969985 is a wasteful number, since it uses less digits than its factorization.

11969985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5888.

The product of its digits is 174960, while the sum is 48.

The square root of 11969985 is about 3459.7666106256. The cubic root of 11969985 is about 228.7518080421.

The spelling of 11969985 in words is "eleven million, nine hundred sixty-nine thousand, nine hundred eighty-five".