9986401 has 4 divisors (see below), whose sum is σ = 9997204.
Its totient is φ = 9975600.
The previous prime is 9986377. The next prime is 9986407. The reversal of 9986401 is 1046899.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.
It can be written as a sum of positive squares in 2 ways, for example, as 5058001 + 4928400 = 2249^2 + 2220^2
It is a cyclic number.
It is not a de Polignac number, because 9986401 - 25 = 9986369 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (9986407) 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, 3870 + ... + 5911.
It is an arithmetic number, because the mean of its divisors is an integer number (2499301).
Almost surely, 29986401 is an apocalyptic number.
9986401 is the 1825-th hex number.
It is an amenable number.
9986401 is a deficient number, since it is larger than the sum of its proper divisors (10803).
9986401 is a wasteful number, since it uses less digits than its factorization.
9986401 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 10802.
The product of its (nonzero) digits is 15552, while the sum is 37.
The square root of 9986401 is about 3160.1267379648.
The cubic root of 9986401 is about 215.3457641757.
The spelling of 9986401 in words is "nine million, nine hundred eighty-six thousand, four hundred one".