3901091 has 4 divisors (see below), whose sum is σ = 3908184. Its totient is φ = 3894000.

The previous prime is 3901087. The next prime is 3901103. The reversal of 3901091 is 1901093.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1901093 = 17 ⋅111829.

It is a cyclic number.

It is not a de Polignac number, because 3901091 - 2² = 3901087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3901031) 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, 2645 + ... + 3846.

It is an arithmetic number, because the mean of its divisors is an integer number (977046).

Almost surely, 2^3901091 is an apocalyptic number.

3901091 is a deficient number, since it is larger than the sum of its proper divisors (7093).

3901091 is an equidigital number, since it uses as much as digits as its factorization.

3901091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7092.

The product of its (nonzero) digits is 243, while the sum is 23.

The square root of 3901091 is about 1975.1179711602. The cubic root of 3901091 is about 157.4207680764.

The spelling of 3901091 in words is "three million, nine hundred one thousand, ninety-one".