2905091 has 4 divisors (see below), whose sum is σ = 3320112. Its totient is φ = 2490072.

The previous prime is 2905087. The next prime is 2905093. The reversal of 2905091 is 1905092.

It is a happy number.

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 2905091 - 2² = 2905087 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2905091.

It is not an unprimeable number, because it can be changed into a prime (2905093) 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, 207500 + ... + 207513.

It is an arithmetic number, because the mean of its divisors is an integer number (830028).

2^2905091 is an apocalyptic number.

2905091 is a deficient number, since it is larger than the sum of its proper divisors (415021).

2905091 is an equidigital number, since it uses as much as digits as its factorization.

2905091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415020.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 2905091 is about 1704.4327502134. The cubic root of 2905091 is about 142.6877140413.

Subtracting from 2905091 its reverse (1905092), we obtain a palindrome (999999).

The spelling of 2905091 in words is "two million, nine hundred five thousand, ninety-one".