986649021 has 12 divisors (see below), whose sum is σ = 1425842080. Its totient is φ = 657451080.

The previous prime is 986649017. The next prime is 986649029. The reversal of 986649021 is 120946689.

It is a happy number.

It is not a de Polignac number, because 986649021 - 2² = 986649017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (986649029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5545 + ... + 44766.

Almost surely, 2^986649021 is an apocalyptic number.

It is an amenable number.

986649021 is a deficient number, since it is larger than the sum of its proper divisors (439193059).

986649021 is a wasteful number, since it uses less digits than its factorization.

986649021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52496 (or 52493 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 986649021 is about 31410.9697558035. The cubic root of 986649021 is about 995.5297200409.

The spelling of 986649021 in words is "nine hundred eighty-six million, six hundred forty-nine thousand, twenty-one".