3959950643 has 16 divisors (see below), whose sum is σ = 4450968576. Its totient is φ = 3492128640.

The previous prime is 3959950637. The next prime is 3959950681. The reversal of 3959950643 is 3460599593.

It is a de Polignac number, because none of the positive numbers 2^k-3959950643 is a prime.

It is a super-2 number, since 2×3959950643² = 31362418189992226898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3959950693) 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, 24530 + ... + 92312.

It is an arithmetic number, because the mean of its divisors is an integer number (278185536).

Almost surely, 2^3959950643 is an apocalyptic number.

3959950643 is a deficient number, since it is larger than the sum of its proper divisors (491017933).

3959950643 is a wasteful number, since it uses less digits than its factorization.

3959950643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67954.

The product of its (nonzero) digits is 3936600, while the sum is 53.

The square root of 3959950643 is about 62928.1387218786. The cubic root of 3959950643 is about 1582.0854056595.

The spelling of 3959950643 in words is "three billion, nine hundred fifty-nine million, nine hundred fifty thousand, six hundred forty-three".