3991095606 has 8 divisors (see below), whose sum is σ = 7982191224. Its totient is φ = 1330365200.

The previous prime is 3991095599. The next prime is 3991095607. The reversal of 3991095606 is 6065901993.

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

3991095606 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3991095607) 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, 332591295 + ... + 332591306.

It is an arithmetic number, because the mean of its divisors is an integer number (997773903).

Almost surely, 2^3991095606 is an apocalyptic number.

3991095606 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3991095606 is a wasteful number, since it uses less digits than its factorization.

3991095606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665182606.

The product of its (nonzero) digits is 393660, while the sum is 48.

The square root of 3991095606 is about 63175.1185673600. The cubic root of 3991095606 is about 1586.2222731422. Note that the first 4 decimals are identical.

The spelling of 3991095606 in words is "three billion, nine hundred ninety-one million, ninety-five thousand, six hundred six".