8261987 has 4 divisors (see below), whose sum is σ = 8270640. Its totient is φ = 8253336.

The previous prime is 8261969. The next prime is 8261993. The reversal of 8261987 is 7891628.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8261987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8261917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2687 + ... + 4872.

It is an arithmetic number, because the mean of its divisors is an integer number (2067660).

Almost surely, 2^8261987 is an apocalyptic number.

8261987 is a deficient number, since it is larger than the sum of its proper divisors (8653).

8261987 is a wasteful number, since it uses less digits than its factorization.

8261987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8652.

The product of its digits is 48384, while the sum is 41.

The square root of 8261987 is about 2874.3672347145. The cubic root of 8261987 is about 202.1598169933.

The spelling of 8261987 in words is "eight million, two hundred sixty-one thousand, nine hundred eighty-seven".