987031 has 4 divisors (see below), whose sum is σ = 1039000. Its totient is φ = 935064.

The previous prime is 987029. The next prime is 987043. The reversal of 987031 is 130789.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130789 = 31 ⋅4219.

It is a cyclic number.

It is not a de Polignac number, because 987031 - 2¹ = 987029 is a prime.

It is a super-2 number, since 2×987031² = 1948460389922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987061) 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, 25956 + ... + 25993.

It is an arithmetic number, because the mean of its divisors is an integer number (259750).

2⁹⁸⁷⁰³¹ is an apocalyptic number.

987031 is a deficient number, since it is larger than the sum of its proper divisors (51969).

987031 is a wasteful number, since it uses less digits than its factorization.

987031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51968.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 987031 is about 993.4943381822. The cubic root of 987031 is about 99.5658175846.

The spelling of 987031 in words is "nine hundred eighty-seven thousand, thirty-one".