3948855491 has 4 divisors (see below), whose sum is σ = 4512977712. Its totient is φ = 3384733272.

The previous prime is 3948855473. The next prime is 3948855497. The reversal of 3948855491 is 1945588493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1945588493 = 283 ⋅6874871.

It is a cyclic number.

It is not a de Polignac number, because 3948855491 - 2³⁰ = 2875113667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3948855497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282061100 + ... + 282061113.

It is an arithmetic number, because the mean of its divisors is an integer number (1128244428).

Almost surely, 2^3948855491 is an apocalyptic number.

3948855491 is a deficient number, since it is larger than the sum of its proper divisors (564122221).

3948855491 is an equidigital number, since it uses as much as digits as its factorization.

3948855491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564122220.

The product of its digits is 6220800, while the sum is 56.

The square root of 3948855491 is about 62839.9195655119. The cubic root of 3948855491 is about 1580.6064396133.

The spelling of 3948855491 in words is "three billion, nine hundred forty-eight million, eight hundred fifty-five thousand, four hundred ninety-one".