3876449491 has 4 divisors (see below), whose sum is σ = 3880076800. Its totient is φ = 3872822184.

The previous prime is 3876449471. The next prime is 3876449543. The reversal of 3876449491 is 1949446783.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1949446783 = 139 ⋅14024797.

It is a cyclic number.

It is not a de Polignac number, because 3876449491 - 2²³ = 3868060883 is a prime.

It is a super-3 number, since 3×3876449491³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3876449471) 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, 1812051 + ... + 1814188.

It is an arithmetic number, because the mean of its divisors is an integer number (970019200).

Almost surely, 2^3876449491 is an apocalyptic number.

3876449491 is a deficient number, since it is larger than the sum of its proper divisors (3627309).

3876449491 is a wasteful number, since it uses less digits than its factorization.

3876449491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3627308.

The product of its digits is 5225472, while the sum is 55.

The square root of 3876449491 is about 62261.1394932666. The cubic root of 3876449491 is about 1570.8861470709.

The spelling of 3876449491 in words is "three billion, eight hundred seventy-six million, four hundred forty-nine thousand, four hundred ninety-one".