986087021 has 4 divisors (see below), whose sum is σ = 1002252444. Its totient is φ = 969921600.

The previous prime is 986087017. The next prime is 986087041. The reversal of 986087021 is 120780689.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 243796996 + 742290025 = 15614^2 + 27245^2 .

It is a cyclic number.

It is not a de Polignac number, because 986087021 - 2² = 986087017 is a prime.

It is a super-2 number, since 2×986087021² = 1944735225969308882, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 986087021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (986087041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8082620 + ... + 8082741.

It is an arithmetic number, because the mean of its divisors is an integer number (250563111).

Almost surely, 2^986087021 is an apocalyptic number.

It is an amenable number.

986087021 is a deficient number, since it is larger than the sum of its proper divisors (16165423).

986087021 is a wasteful number, since it uses less digits than its factorization.

986087021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16165422.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 986087021 is about 31402.0225622491. The cubic root of 986087021 is about 995.3406646445.

The spelling of 986087021 in words is "nine hundred eighty-six million, eighty-seven thousand, twenty-one".