986671521 has 24 divisors (see below), whose sum is σ = 1556798880. Its totient is φ = 597196800.

The previous prime is 986671513. The next prime is 986671537. The reversal of 986671521 is 125176689.

It is not a de Polignac number, because 986671521 - 2³ = 986671513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (986671561) 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 23 ways as a sum of consecutive naturals, for example, 74145 + ... + 86433.

It is an arithmetic number, because the mean of its divisors is an integer number (64866620).

Almost surely, 2^986671521 is an apocalyptic number.

It is an amenable number.

986671521 is a deficient number, since it is larger than the sum of its proper divisors (570127359).

986671521 is a wasteful number, since it uses less digits than its factorization.

986671521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13117 (or 13114 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 986671521 is about 31411.3279088930. The cubic root of 986671521 is about 995.5372874899.

The spelling of 986671521 in words is "nine hundred eighty-six million, six hundred seventy-one thousand, five hundred twenty-one".