3939957634403 has 4 divisors (see below), whose sum is σ = 4502808725040. Its totient is φ = 3377106543768.

The previous prime is 3939957634357. The next prime is 3939957634441. The reversal of 3939957634403 is 3044367599393.

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 3939957634403 - 2¹⁰ = 3939957633379 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3939957634403.

It is not an unprimeable number, because it can be changed into a prime (3939957636403) 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, 281425545308 + ... + 281425545321.

It is an arithmetic number, because the mean of its divisors is an integer number (1125702181260).

Almost surely, 2^{3939957634403} is an apocalyptic number.

3939957634403 is a deficient number, since it is larger than the sum of its proper divisors (562851090637).

3939957634403 is an equidigital number, since it uses as much as digits as its factorization.

3939957634403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562851090636.

The product of its (nonzero) digits is 198404640, while the sum is 65.

The spelling of 3939957634403 in words is "three trillion, nine hundred thirty-nine billion, nine hundred fifty-seven million, six hundred thirty-four thousand, four hundred three".