11956987 has 12 divisors (see below), whose sum is σ = 14289520. Its totient is φ = 9800208.

The previous prime is 11956951. The next prime is 11956991. The reversal of 11956987 is 78965911.

It is a happy number.

It is not a de Polignac number, because 11956987 - 2⁷ = 11956859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11956907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2089 + ... + 5317.

Almost surely, 2^11956987 is an apocalyptic number.

11956987 is a deficient number, since it is larger than the sum of its proper divisors (2332533).

11956987 is an equidigital number, since it uses as much as digits as its factorization.

11956987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3282 (or 3259 counting only the distinct ones).

The product of its digits is 136080, while the sum is 46.

The square root of 11956987 is about 3457.8876499967. The cubic root of 11956987 is about 228.6689788412.

The spelling of 11956987 in words is "eleven million, nine hundred fifty-six thousand, nine hundred eighty-seven".