3974134891 has 4 divisors (see below), whose sum is σ = 3974483952. Its totient is φ = 3973785832.

The previous prime is 3974134883. The next prime is 3974134903. The reversal of 3974134891 is 1984314793.

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 3974134891 - 2³ = 3974134883 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3974134291) 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, 156856 + ... + 180421.

It is an arithmetic number, because the mean of its divisors is an integer number (993620988).

Almost surely, 2^3974134891 is an apocalyptic number.

3974134891 is a deficient number, since it is larger than the sum of its proper divisors (349061).

3974134891 is a wasteful number, since it uses less digits than its factorization.

3974134891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349060.

The product of its digits is 653184, while the sum is 49.

The square root of 3974134891 is about 63040.7399306195. The cubic root of 3974134891 is about 1583.9721254139.

The spelling of 3974134891 in words is "three billion, nine hundred seventy-four million, one hundred thirty-four thousand, eight hundred ninety-one".