984987 has 12 divisors (see below), whose sum is σ = 1466920. Its totient is φ = 653220.

The previous prime is 984959. The next prime is 985003. The reversal of 984987 is 789489.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 984987 - 2⁶ = 984923 is a prime.

It is an Ulam number.

It is a Duffinian number.

984987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (984917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5062 + ... + 5252.

2⁹⁸⁴⁹⁸⁷ is an apocalyptic number.

984987 is a deficient number, since it is larger than the sum of its proper divisors (481933).

984987 is an equidigital number, since it uses as much as digits as its factorization.

984987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391 (or 194 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 984987 is about 992.4651127370. The cubic root of 984987 is about 99.4970412325.

The spelling of 984987 in words is "nine hundred eighty-four thousand, nine hundred eighty-seven".