3849979391 has 4 divisors (see below), whose sum is σ = 3850343784. Its totient is φ = 3849615000.

The previous prime is 3849979351. The next prime is 3849979411. The reversal of 3849979391 is 1939799483.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1939799483 = 829 ⋅2339927.

It is a cyclic number.

It is not a de Polignac number, because 3849979391 - 2³⁰ = 2776237567 is a prime.

It is a super-2 number, since 2×3849979391² = 29644682622249461762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3849979351) 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, 165860 + ... + 187641.

It is an arithmetic number, because the mean of its divisors is an integer number (962585946).

Almost surely, 2^3849979391 is an apocalyptic number.

3849979391 is a deficient number, since it is larger than the sum of its proper divisors (364393).

3849979391 is a wasteful number, since it uses less digits than its factorization.

3849979391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364392.

The product of its digits is 13226976, while the sum is 62.

The square root of 3849979391 is about 62048.2021576774. The cubic root of 3849979391 is about 1567.3024106475.

The spelling of 3849979391 in words is "three billion, eight hundred forty-nine million, nine hundred seventy-nine thousand, three hundred ninety-one".