3991425133 has 8 divisors (see below), whose sum is σ = 4290894720. Its totient is φ = 3700895040.

The previous prime is 3991425131. The next prime is 3991425157. The reversal of 3991425133 is 3315241993.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3991425133 - 2¹ = 3991425131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3991425131) 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 7 ways as a sum of consecutive naturals, for example, 2233948 + ... + 2235733.

It is an arithmetic number, because the mean of its divisors is an integer number (536361840).

Almost surely, 2^3991425133 is an apocalyptic number.

It is an amenable number.

3991425133 is a deficient number, since it is larger than the sum of its proper divisors (299469587).

3991425133 is a wasteful number, since it uses less digits than its factorization.

3991425133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4469747.

The product of its digits is 87480, while the sum is 40.

The square root of 3991425133 is about 63177.7265577039. The cubic root of 3991425133 is about 1586.2659277117.

The spelling of 3991425133 in words is "three billion, nine hundred ninety-one million, four hundred twenty-five thousand, one hundred thirty-three".