2091873 has 32 divisors (see below), whose sum is σ = 3428352. Its totient is φ = 1108800.

The previous prime is 2091871. The next prime is 2091877. The reversal of 2091873 is 3781902.

It is a happy number.

It is not a de Polignac number, because 2091873 - 2¹ = 2091871 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a nialpdrome in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 2091873.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29428 + ... + 29498.

It is an arithmetic number, because the mean of its divisors is an integer number (107136).

2^2091873 is an apocalyptic number.

2091873 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

2091873 is a deficient number, since it is larger than the sum of its proper divisors (1336479).

2091873 is a wasteful number, since it uses less digits than its factorization.

2091873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 2091873 is about 1446.3308750075. The cubic root of 2091873 is about 127.8925082259.

The spelling of 2091873 in words is "two million, ninety-one thousand, eight hundred seventy-three".