2319891 has 16 divisors (see below), whose sum is σ = 3595008. Its totient is φ = 1303200.

The previous prime is 2319887. The next prime is 2319901. The reversal of 2319891 is 1989132.

It is not a de Polignac number, because 2319891 - 2² = 2319887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2319841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 376 + ... + 2186.

It is an arithmetic number, because the mean of its divisors is an integer number (224688).

2^2319891 is an apocalyptic number.

2319891 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2319891 is a deficient number, since it is larger than the sum of its proper divisors (1275117).

2319891 is a wasteful number, since it uses less digits than its factorization.

2319891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1882.

The product of its digits is 3888, while the sum is 33.

The square root of 2319891 is about 1523.1188397495. The cubic root of 2319891 is about 132.3800457023.

The spelling of 2319891 in words is "two million, three hundred nineteen thousand, eight hundred ninety-one".