39945963 has 16 divisors (see below), whose sum is σ = 57496320. Its totient is φ = 24593184.

The previous prime is 39945953. The next prime is 39945967. The reversal of 39945963 is 36954993.

It is a happy number.

39945963 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 39945963 - 2⁴ = 39945947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39945967) 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 15 ways as a sum of consecutive naturals, for example, 7981 + ... + 11982.

It is an arithmetic number, because the mean of its divisors is an integer number (3593520).

Almost surely, 2^39945963 is an apocalyptic number.

39945963 is a deficient number, since it is larger than the sum of its proper divisors (17550357).

39945963 is a wasteful number, since it uses less digits than its factorization.

39945963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20018.

The product of its digits is 787320, while the sum is 48.

The square root of 39945963 is about 6320.2818766254. The cubic root of 39945963 is about 341.8411166506.

The spelling of 39945963 in words is "thirty-nine million, nine hundred forty-five thousand, nine hundred sixty-three".