11957887 has 4 divisors (see below), whose sum is σ = 12008160. Its totient is φ = 11907616.

The previous prime is 11957867. The next prime is 11957903. The reversal of 11957887 is 78875911.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11957887 is a prime.

It is a Duffinian number.

11957887 is a modest number, since divided by 7887 gives 1195 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11957867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24778 + ... + 25255.

It is an arithmetic number, because the mean of its divisors is an integer number (3002040).

Almost surely, 2^11957887 is an apocalyptic number.

11957887 is a deficient number, since it is larger than the sum of its proper divisors (50273).

11957887 is an equidigital number, since it uses as much as digits as its factorization.

11957887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50272.

The product of its digits is 141120, while the sum is 46.

The square root of 11957887 is about 3458.0177848010. The cubic root of 11957887 is about 228.6747159866.

The spelling of 11957887 in words is "eleven million, nine hundred fifty-seven thousand, eight hundred eighty-seven".