2091814 has 4 divisors (see below), whose sum is σ = 3137724. Its totient is φ = 1045906.

The previous prime is 2091809. The next prime is 2091839. The reversal of 2091814 is 4181902.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4181902 = 2 ⋅2090951.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522952 + ... + 522955.

It is an arithmetic number, because the mean of its divisors is an integer number (784431).

2^2091814 is an apocalyptic number.

2091814 is a deficient number, since it is larger than the sum of its proper divisors (1045910).

2091814 is a wasteful number, since it uses less digits than its factorization.

2091814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045909.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 2091814 is about 1446.3104784243. The cubic root of 2091814 is about 127.8913058379.

The spelling of 2091814 in words is "two million, ninety-one thousand, eight hundred fourteen".