987231 has 16 divisors (see below), whose sum is σ = 1534464. Its totient is φ = 552864.

The previous prime is 987227. The next prime is 987251. The reversal of 987231 is 132789.

It is a happy number.

It is not a de Polignac number, because 987231 - 2² = 987227 is a prime.

It is a super-2 number, since 2×987231² = 1949250094722, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 987231.

It is not an unprimeable number, because it can be changed into a prime (987211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 670 + ... + 1556.

It is an arithmetic number, because the mean of its divisors is an integer number (95904).

2⁹⁸⁷²³¹ is an apocalyptic number.

987231 is a deficient number, since it is larger than the sum of its proper divisors (547233).

987231 is a wasteful number, since it uses less digits than its factorization.

987231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950.

The product of its digits is 3024, while the sum is 30.

The square root of 987231 is about 993.5949879101. The cubic root of 987231 is about 99.5725420673.

The spelling of 987231 in words is "nine hundred eighty-seven thousand, two hundred thirty-one".