3967955843 has 4 divisors (see below), whose sum is σ = 3968243088. Its totient is φ = 3967668600.

The previous prime is 3967955779. The next prime is 3967955857. The reversal of 3967955843 is 3485597693.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3967955843 - 2⁶ = 3967955779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3967955863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121796 + ... + 150897.

It is an arithmetic number, because the mean of its divisors is an integer number (992060772).

Almost surely, 2^3967955843 is an apocalyptic number.

3967955843 is a deficient number, since it is larger than the sum of its proper divisors (287245).

3967955843 is a wasteful number, since it uses less digits than its factorization.

3967955843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287244.

The product of its digits is 24494400, while the sum is 59.

The square root of 3967955843 is about 62991.7124945814. The cubic root of 3967955843 is about 1583.1507712489.

The spelling of 3967955843 in words is "three billion, nine hundred sixty-seven million, nine hundred fifty-five thousand, eight hundred forty-three".