3908312891 has 4 divisors (see below), whose sum is σ = 4466643312. Its totient is φ = 3349982472.

The previous prime is 3908312873. The next prime is 3908312959. The reversal of 3908312891 is 1982138093.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3908312891 - 2¹⁰ = 3908311867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3908312831) 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, 279165200 + ... + 279165213.

It is an arithmetic number, because the mean of its divisors is an integer number (1116660828).

Almost surely, 2^3908312891 is an apocalyptic number.

3908312891 is a deficient number, since it is larger than the sum of its proper divisors (558330421).

3908312891 is an equidigital number, since it uses as much as digits as its factorization.

3908312891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558330420.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 3908312891 is about 62516.5009497493. The cubic root of 3908312891 is about 1575.1784987583.

The spelling of 3908312891 in words is "three billion, nine hundred eight million, three hundred twelve thousand, eight hundred ninety-one".