39921117 has 16 divisors (see below), whose sum is σ = 56687040. Its totient is φ = 24902912.

The previous prime is 39921107. The next prime is 39921127. The reversal of 39921117 is 71112993.

39921117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (39921107) and next prime (39921127).

It is a cyclic number.

It is not a de Polignac number, because 39921117 - 2¹⁶ = 39855581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39921107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6943 + ... + 11315.

It is an arithmetic number, because the mean of its divisors is an integer number (3542940).

Almost surely, 2^39921117 is an apocalyptic number.

It is an amenable number.

39921117 is a deficient number, since it is larger than the sum of its proper divisors (16765923).

39921117 is a wasteful number, since it uses less digits than its factorization.

39921117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4572.

The product of its digits is 3402, while the sum is 33.

The square root of 39921117 is about 6318.3159939971. The cubic root of 39921117 is about 341.7702280026.

The spelling of 39921117 in words is "thirty-nine million, nine hundred twenty-one thousand, one hundred seventeen".