2119391 has 4 divisors (see below), whose sum is σ = 2122872. Its totient is φ = 2115912.

The previous prime is 2119379. The next prime is 2119399. The reversal of 2119391 is 1939112.

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 2119391 - 2¹⁴ = 2103007 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 2119391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2119399) 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, 560 + ... + 2133.

It is an arithmetic number, because the mean of its divisors is an integer number (530718).

2^2119391 is an apocalyptic number.

2119391 is a deficient number, since it is larger than the sum of its proper divisors (3481).

2119391 is an equidigital number, since it uses as much as digits as its factorization.

2119391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3480.

The product of its digits is 486, while the sum is 26.

The square root of 2119391 is about 1455.8128313763. The cubic root of 2119391 is about 128.4508636391.

The spelling of 2119391 in words is "two million, one hundred nineteen thousand, three hundred ninety-one".