3991101 has 8 divisors (see below), whose sum is σ = 5332320. Its totient is φ = 2655312.

The previous prime is 3991093. The next prime is 3991103. The reversal of 3991101 is 1011993.

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

It is not a de Polignac number, because 3991101 - 2³ = 3991093 is a prime.

It is a Curzon number.

3991101 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3991103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 895 + ... + 2963.

It is an arithmetic number, because the mean of its divisors is an integer number (666540).

Almost surely, 2^3991101 is an apocalyptic number.

It is an amenable number.

3991101 is a deficient number, since it is larger than the sum of its proper divisors (1341219).

3991101 is a wasteful number, since it uses less digits than its factorization.

3991101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2715.

The product of its (nonzero) digits is 243, while the sum is 24.

The square root of 3991101 is about 1997.7740112435. The cubic root of 3991101 is about 158.6222987740.

The spelling of 3991101 in words is "three million, nine hundred ninety-one thousand, one hundred one".