986421001 has 4 divisors (see below), whose sum is σ = 1005032772. Its totient is φ = 967809232.

The previous prime is 986420983. The next prime is 986421011. The reversal of 986421001 is 100124689.

It is a happy number.

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 598291600 + 388129401 = 24460^2 + 19701^2 .

It is a cyclic number.

It is not a de Polignac number, because 986421001 - 2⁵ = 986420969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (986421011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9305806 + ... + 9305911.

It is an arithmetic number, because the mean of its divisors is an integer number (251258193).

Almost surely, 2^986421001 is an apocalyptic number.

It is an amenable number.

986421001 is a deficient number, since it is larger than the sum of its proper divisors (18611771).

986421001 is a wasteful number, since it uses less digits than its factorization.

986421001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18611770.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 986421001 is about 31407.3399223812. The cubic root of 986421001 is about 995.4530233395.

The spelling of 986421001 in words is "nine hundred eighty-six million, four hundred twenty-one thousand, one".