11693987 has 4 divisors (see below), whose sum is σ = 12309480. Its totient is φ = 11078496.

The previous prime is 11693963. The next prime is 11694013. The reversal of 11693987 is 78939611.

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

It is a cyclic number.

It is not a de Polignac number, because 11693987 - 2¹⁰ = 11692963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11693587) 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, 307718 + ... + 307755.

It is an arithmetic number, because the mean of its divisors is an integer number (3077370).

Almost surely, 2^11693987 is an apocalyptic number.

11693987 is a deficient number, since it is larger than the sum of its proper divisors (615493).

11693987 is an equidigital number, since it uses as much as digits as its factorization.

11693987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615492.

The product of its digits is 81648, while the sum is 44.

The square root of 11693987 is about 3419.6472040256. The cubic root of 11693987 is about 226.9799706755.

The spelling of 11693987 in words is "eleven million, six hundred ninety-three thousand, nine hundred eighty-seven".