39964117 has 4 divisors (see below), whose sum is σ = 41342220. Its totient is φ = 38586016.

The previous prime is 39964091. The next prime is 39964121. The reversal of 39964117 is 71146993.

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 32787076 + 7177041 = 5726^2 + 2679^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39964117 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 39964117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39964187) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 689008 + ... + 689065.

It is an arithmetic number, because the mean of its divisors is an integer number (10335555).

Almost surely, 2^39964117 is an apocalyptic number.

It is an amenable number.

39964117 is a deficient number, since it is larger than the sum of its proper divisors (1378103).

39964117 is a wasteful number, since it uses less digits than its factorization.

39964117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378102.

The product of its digits is 40824, while the sum is 40.

The square root of 39964117 is about 6321.7178836136. The cubic root of 39964117 is about 341.8928936288.

It can be divided in two parts, 399 and 64117, that added together give a square (64516 = 254²).

The spelling of 39964117 in words is "thirty-nine million, nine hundred sixty-four thousand, one hundred seventeen".