2098765 has 4 divisors (see below), whose sum is σ = 2518524. Its totient is φ = 1679008.

The previous prime is 2098763. The next prime is 2098777. The reversal of 2098765 is 5678902.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5678902 = 2 ⋅2839451.

It can be written as a sum of positive squares in 2 ways, for example, as 393129 + 1705636 = 627^2 + 1306^2 .

It is a cyclic number.

It is not a de Polignac number, because 2098765 - 2¹ = 2098763 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2098763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209872 + ... + 209881.

It is an arithmetic number, because the mean of its divisors is an integer number (629631).

2^2098765 is an apocalyptic number.

It is an amenable number.

2098765 is a deficient number, since it is larger than the sum of its proper divisors (419759).

2098765 is an equidigital number, since it uses as much as digits as its factorization.

2098765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419758.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 2098765 is about 1448.7114964685. The cubic root of 2098765 is about 128.0328081591.

The spelling of 2098765 in words is "two million, ninety-eight thousand, seven hundred sixty-five".