39940947 has 6 divisors (see below), whose sum is σ = 57692492. Its totient is φ = 26627292.

The previous prime is 39940933. The next prime is 39940961. The reversal of 39940947 is 74904993.

39940947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (39940933) and next prime (39940961).

It is not a de Polignac number, because 39940947 - 2⁴ = 39940931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39940997) 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 5 ways as a sum of consecutive naturals, for example, 2218933 + ... + 2218950.

Almost surely, 2^39940947 is an apocalyptic number.

39940947 is a deficient number, since it is larger than the sum of its proper divisors (17751545).

39940947 is a wasteful number, since it uses less digits than its factorization.

39940947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4437889 (or 4437886 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 39940947 is about 6319.8850464229. The cubic root of 39940947 is about 341.8268077635.

The spelling of 39940947 in words is "thirty-nine million, nine hundred forty thousand, nine hundred forty-seven".