11533987 has 2 divisors, whose sum is σ = 11533988. Its totient is φ = 11533986.

The previous prime is 11533981. The next prime is 11533993. The reversal of 11533987 is 78933511.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (11533981) and next prime (11533993).

It is a cyclic number.

It is not a de Polignac number, because 11533987 - 2⁷ = 11533859 is a prime.

It is a super-2 number, since 2×11533987² = 266065712232338, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11533981) 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 as a sum of consecutive naturals, namely, 5766993 + 5766994.

It is an arithmetic number, because the mean of its divisors is an integer number (5766994).

Almost surely, 2^11533987 is an apocalyptic number.

11533987 is a deficient number, since it is larger than the sum of its proper divisors (1).

11533987 is an equidigital number, since it uses as much as digits as its factorization.

11533987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 37.

The square root of 11533987 is about 3396.1724043399. The cubic root of 11533987 is about 225.9400146227.

The spelling of 11533987 in words is "eleven million, five hundred thirty-three thousand, nine hundred eighty-seven".