11315987 has 2 divisors, whose sum is σ = 11315988. Its totient is φ = 11315986.

The previous prime is 11315981. The next prime is 11315989. The reversal of 11315987 is 78951311.

11315987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11315987 - 2¹² = 11311891 is a prime.

Together with 11315989, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₇₄₅₉₈₂ and since 11315987 and 745982 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (11315981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5657993 + 5657994.

It is an arithmetic number, because the mean of its divisors is an integer number (5657994).

Almost surely, 2^11315987 is an apocalyptic number.

11315987 is a deficient number, since it is larger than the sum of its proper divisors (1).

11315987 is an equidigital number, since it uses as much as digits as its factorization.

11315987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 35.

The square root of 11315987 is about 3363.9243451659. The cubic root of 11315987 is about 224.5074790457.

The spelling of 11315987 in words is "eleven million, three hundred fifteen thousand, nine hundred eighty-seven".