987897 has 4 divisors (see below), whose sum is σ = 1317200. Its totient is φ = 658596.

The previous prime is 987869. The next prime is 987911. The reversal of 987897 is 798789.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 987897 - 2¹⁴ = 971513 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (987097) 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, 164647 + ... + 164652.

It is an arithmetic number, because the mean of its divisors is an integer number (329300).

2⁹⁸⁷⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

987897 is a deficient number, since it is larger than the sum of its proper divisors (329303).

987897 is a wasteful number, since it uses less digits than its factorization.

987897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329302.

The product of its digits is 254016, while the sum is 48.

The square root of 987897 is about 993.9300780236. The cubic root of 987897 is about 99.5949280493.

The spelling of 987897 in words is "nine hundred eighty-seven thousand, eight hundred ninety-seven".