8133987 has 4 divisors (see below), whose sum is σ = 10845320. Its totient is φ = 5422656.

The previous prime is 8133971. The next prime is 8133989. The reversal of 8133987 is 7893318.

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

It is not a de Polignac number, because 8133987 - 2⁴ = 8133971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8133989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1355662 + ... + 1355667.

It is an arithmetic number, because the mean of its divisors is an integer number (2711330).

Almost surely, 2^8133987 is an apocalyptic number.

8133987 is a deficient number, since it is larger than the sum of its proper divisors (2711333).

8133987 is a wasteful number, since it uses less digits than its factorization.

8133987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2711332.

The product of its digits is 36288, while the sum is 39.

The square root of 8133987 is about 2852.0145511550. The cubic root of 8133987 is about 201.1103821817.

The spelling of 8133987 in words is "eight million, one hundred thirty-three thousand, nine hundred eighty-seven".