987684945 has 64 divisors (see below), whose sum is σ = 1745743104. Its totient is φ = 473840640.

The previous prime is 987684941. The next prime is 987684949. The reversal of 987684945 is 549486789.

It is an interprime number because it is at equal distance from previous prime (987684941) and next prime (987684949).

It is not a de Polignac number, because 987684945 - 2² = 987684941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (987684941) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2345835 + ... + 2346255.

It is an arithmetic number, because the mean of its divisors is an integer number (27277236).

Almost surely, 2^987684945 is an apocalyptic number.

It is an amenable number.

987684945 is a deficient number, since it is larger than the sum of its proper divisors (758058159).

987684945 is a wasteful number, since it uses less digits than its factorization.

987684945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722.

The product of its digits is 17418240, while the sum is 60.

The square root of 987684945 is about 31427.4552740116. The cubic root of 987684945 is about 995.8780142453.

The spelling of 987684945 in words is "nine hundred eighty-seven million, six hundred eighty-four thousand, nine hundred forty-five".