39947903 has 8 divisors (see below), whose sum is σ = 41129088. Its totient is φ = 38778264.

The previous prime is 39947893. The next prime is 39947939. The reversal of 39947903 is 30974993.

It is a happy number.

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 39947903 - 2¹² = 39943807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39947953) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4400 + ... + 9962.

It is an arithmetic number, because the mean of its divisors is an integer number (5141136).

Almost surely, 2^39947903 is an apocalyptic number.

39947903 is a deficient number, since it is larger than the sum of its proper divisors (1181185).

39947903 is a wasteful number, since it uses less digits than its factorization.

39947903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5773.

The product of its (nonzero) digits is 183708, while the sum is 44.

The square root of 39947903 is about 6320.4353489297. The cubic root of 39947903 is about 341.8466504683.

The spelling of 39947903 in words is "thirty-nine million, nine hundred forty-seven thousand, nine hundred three".