39684121 has 16 divisors (see below), whose sum is σ = 41990400. Its totient is φ = 37468288.

The previous prime is 39684107. The next prime is 39684133. The reversal of 39684121 is 12148693.

It is not a de Polignac number, because 39684121 - 2⁵ = 39684089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39684191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221610 + ... + 221788.

It is an arithmetic number, because the mean of its divisors is an integer number (2624400).

Almost surely, 2^39684121 is an apocalyptic number.

It is an amenable number.

39684121 is a deficient number, since it is larger than the sum of its proper divisors (2306279).

39684121 is a wasteful number, since it uses less digits than its factorization.

39684121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368.

The product of its digits is 10368, while the sum is 34.

The square root of 39684121 is about 6299.5333954191. The cubic root of 39684121 is about 341.0925666662.

The spelling of 39684121 in words is "thirty-nine million, six hundred eighty-four thousand, one hundred twenty-one".