39993361 has 4 divisors (see below), whose sum is σ = 40011300. Its totient is φ = 39975424.

The previous prime is 39993341. The next prime is 39993403. The reversal of 39993361 is 16339993.

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 10497600 + 29495761 = 3240^2 + 5431^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39993361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39993341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5056 + ... + 10273.

It is an arithmetic number, because the mean of its divisors is an integer number (10002825).

Almost surely, 2^39993361 is an apocalyptic number.

It is an amenable number.

39993361 is a deficient number, since it is larger than the sum of its proper divisors (17939).

39993361 is a wasteful number, since it uses less digits than its factorization.

39993361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17938.

The product of its digits is 118098, while the sum is 43.

The square root of 39993361 is about 6324.0304395219. The cubic root of 39993361 is about 341.9762674046.

The spelling of 39993361 in words is "thirty-nine million, nine hundred ninety-three thousand, three hundred sixty-one".