3956985107 has 4 divisors (see below), whose sum is σ = 3962340360. Its totient is φ = 3951629856.

The previous prime is 3956985089. The next prime is 3956985121. The reversal of 3956985107 is 7015896593.

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 3956985107 - 2²⁰ = 3955936531 is a prime.

It is a super-2 number, since 2×3956985107² = 31315462274039602898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3956985167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2676518 + ... + 2677995.

It is an arithmetic number, because the mean of its divisors is an integer number (990585090).

Almost surely, 2^3956985107 is an apocalyptic number.

3956985107 is a deficient number, since it is larger than the sum of its proper divisors (5355253).

3956985107 is an equidigital number, since it uses as much as digits as its factorization.

3956985107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5355252.

The product of its (nonzero) digits is 2041200, while the sum is 53.

The square root of 3956985107 is about 62904.5714316535. The cubic root of 3956985107 is about 1581.6903752395.

The spelling of 3956985107 in words is "three billion, nine hundred fifty-six million, nine hundred eighty-five thousand, one hundred seven".