987957 has 10 divisors (see below), whose sum is σ = 1475958. Its totient is φ = 658584.

The previous prime is 987941. The next prime is 987971. The reversal of 987957 is 759789.

It can be written as a sum of positive squares in only one way, i.e., 910116 + 77841 = 954^2 + 279^2 .

It is not a de Polignac number, because 987957 - 2⁴ = 987941 is a prime.

987957 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987997) 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 9 ways as a sum of consecutive naturals, for example, 6018 + ... + 6179.

2⁹⁸⁷⁹⁵⁷ is an apocalyptic number.

It is an amenable number.

987957 is a deficient number, since it is larger than the sum of its proper divisors (488001).

987957 is a wasteful number, since it uses less digits than its factorization.

987957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12209 (or 12200 counting only the distinct ones).

The product of its digits is 158760, while the sum is 45.

The square root of 987957 is about 993.9602607750. The cubic root of 987957 is about 99.5969443104.

The spelling of 987957 in words is "nine hundred eighty-seven thousand, nine hundred fifty-seven".