39949917 has 32 divisors (see below), whose sum is σ = 63528960. Its totient is φ = 21850560.

The previous prime is 39949909. The next prime is 39949927. The reversal of 39949917 is 71994993.

39949917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 39949917 - 2³ = 39949909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39949917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39949927) 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 31 ways as a sum of consecutive naturals, for example, 70678 + ... + 71240.

It is an arithmetic number, because the mean of its divisors is an integer number (1985280).

Almost surely, 2^39949917 is an apocalyptic number.

It is an amenable number.

39949917 is a deficient number, since it is larger than the sum of its proper divisors (23579043).

39949917 is a wasteful number, since it uses less digits than its factorization.

39949917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713.

The product of its digits is 551124, while the sum is 51.

The square root of 39949917 is about 6320.5946713897. The cubic root of 39949917 is about 341.8523951802.

The spelling of 39949917 in words is "thirty-nine million, nine hundred forty-nine thousand, nine hundred seventeen".