39995999 has 8 divisors (see below), whose sum is σ = 40548480. Its totient is φ = 39447576.

The previous prime is 39995987. The next prime is 39996023. The reversal of 39995999 is 99959993.

39995999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39995999 - 2⁸ = 39995743 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39995929) 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 7 ways as a sum of consecutive naturals, for example, 22352 + ... + 24074.

It is an arithmetic number, because the mean of its divisors is an integer number (5068560).

Almost surely, 2^39995999 is an apocalyptic number.

39995999 is a deficient number, since it is larger than the sum of its proper divisors (552481).

39995999 is a wasteful number, since it uses less digits than its factorization.

39995999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2029.

The product of its digits is 7971615, while the sum is 62.

The square root of 39995999 is about 6324.2390056038. The cubic root of 39995999 is about 341.9837862655.

The spelling of 39995999 in words is "thirty-nine million, nine hundred ninety-five thousand, nine hundred ninety-nine".