987731441 has 4 divisors (see below), whose sum is σ = 991575012. Its totient is φ = 983887872.

The previous prime is 987731401. The next prime is 987731483. The reversal of 987731441 is 144137789.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 761980816 + 225750625 = 27604^2 + 15025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-987731441 is a prime.

It is a super-2 number, since 2×987731441² = 1951226799079872962, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 987731392 and 987731401.

It is not an unprimeable number, because it can be changed into a prime (987731401) 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, 1921400 + ... + 1921913.

It is an arithmetic number, because the mean of its divisors is an integer number (247893753).

Almost surely, 2^987731441 is an apocalyptic number.

It is an amenable number.

987731441 is a deficient number, since it is larger than the sum of its proper divisors (3843571).

987731441 is a wasteful number, since it uses less digits than its factorization.

987731441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3843570.

The product of its digits is 169344, while the sum is 44.

The square root of 987731441 is about 31428.1950006678. The cubic root of 987731441 is about 995.8936412317.

The spelling of 987731441 in words is "nine hundred eighty-seven million, seven hundred thirty-one thousand, four hundred forty-one".