11687969 has 4 divisors (see below), whose sum is σ = 11715396. Its totient is φ = 11660544.

The previous prime is 11687953. The next prime is 11687989. The reversal of 11687969 is 96978611.

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

It can be written as a sum of positive squares in 2 ways, for example, as 883600 + 10804369 = 940^2 + 3287^2 .

It is a cyclic number.

It is not a de Polignac number, because 11687969 - 2⁴ = 11687953 is a prime.

It is a super-2 number, since 2×11687969² = 273217238689922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11687909) 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, 13064 + ... + 13929.

It is an arithmetic number, because the mean of its divisors is an integer number (2928849).

Almost surely, 2^11687969 is an apocalyptic number.

It is an amenable number.

11687969 is a deficient number, since it is larger than the sum of its proper divisors (27427).

11687969 is an equidigital number, since it uses as much as digits as its factorization.

11687969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27426.

The product of its digits is 163296, while the sum is 47.

The square root of 11687969 is about 3418.7671754596. The cubic root of 11687969 is about 226.9410275887.

The spelling of 11687969 in words is "eleven million, six hundred eighty-seven thousand, nine hundred sixty-nine".