2800091 has 8 divisors (see below), whose sum is σ = 3210240. Its totient is φ = 2392488.

The previous prime is 2800079. The next prime is 2800103. The reversal of 2800091 is 1900082.

It is an interprime number because it is at equal distance from previous prime (2800079) and next prime (2800103).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-2800091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2800001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3920 + ... + 4578.

It is an arithmetic number, because the mean of its divisors is an integer number (401280).

2^2800091 is an apocalyptic number.

2800091 is a deficient number, since it is larger than the sum of its proper divisors (410149).

2800091 is an equidigital number, since it uses as much as digits as its factorization.

2800091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 2800091 is about 1673.3472442981. The cubic root of 2800091 is about 140.9475015395.

Subtracting from 2800091 its reverse (1900082), we obtain a palindrome (900009).

The spelling of 2800091 in words is "two million, eight hundred thousand, ninety-one".