3936172105 has 4 divisors (see below), whose sum is σ = 4723406532. Its totient is φ = 3148937680.

The previous prime is 3936172081. The next prime is 3936172127. The reversal of 3936172105 is 5012716393.

3936172105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5012716393 = 23 ⋅217944191.

It can be written as a sum of positive squares in 2 ways, for example, as 1806165001 + 2130007104 = 42499^2 + 46152^2 .

It is not a de Polignac number, because 3936172105 - 2¹¹ = 3936170057 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393617206 + ... + 393617215.

It is an arithmetic number, because the mean of its divisors is an integer number (1180851633).

Almost surely, 2^3936172105 is an apocalyptic number.

It is an amenable number.

3936172105 is a deficient number, since it is larger than the sum of its proper divisors (787234427).

3936172105 is an equidigital number, since it uses as much as digits as its factorization.

3936172105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787234426.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 3936172105 is about 62738.9201771914. The cubic root of 3936172105 is about 1578.9123670252.

Adding to 3936172105 its reverse (5012716393), we get a palindrome (8948888498).

The spelling of 3936172105 in words is "three billion, nine hundred thirty-six million, one hundred seventy-two thousand, one hundred five".