3949138271 has 8 divisors (see below), whose sum is σ = 4253474400. Its totient is φ = 3644881632.

The previous prime is 3949138261. The next prime is 3949138283. The reversal of 3949138271 is 1728319493.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3949138271 - 2¹⁴ = 3949121887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3949138211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119630 + ... + 149028.

It is an arithmetic number, because the mean of its divisors is an integer number (531684300).

Almost surely, 2^3949138271 is an apocalyptic number.

3949138271 is a deficient number, since it is larger than the sum of its proper divisors (304336129).

3949138271 is a wasteful number, since it uses less digits than its factorization.

3949138271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39745.

The product of its digits is 326592, while the sum is 47.

The square root of 3949138271 is about 62842.1695281123. The cubic root of 3949138271 is about 1580.6441681164.

The spelling of 3949138271 in words is "three billion, nine hundred forty-nine million, one hundred thirty-eight thousand, two hundred seventy-one".