987445897 has 4 divisors (see below), whose sum is σ = 987516160. Its totient is φ = 987375636.

The previous prime is 987445891. The next prime is 987445967. The reversal of 987445897 is 798544789.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 987445897 - 2¹⁵ = 987413129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (987445891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5997 + ... + 44842.

It is an arithmetic number, because the mean of its divisors is an integer number (246879040).

Almost surely, 2^987445897 is an apocalyptic number.

It is an amenable number.

987445897 is a deficient number, since it is larger than the sum of its proper divisors (70263).

987445897 is a wasteful number, since it uses less digits than its factorization.

987445897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70262.

The product of its digits is 20321280, while the sum is 61.

The square root of 987445897 is about 31423.6518724352. The cubic root of 987445897 is about 995.7976641103.

The spelling of 987445897 in words is "nine hundred eighty-seven million, four hundred forty-five thousand, eight hundred ninety-seven".