2098177817 has 4 divisors (see below), whose sum is σ = 2098269540. Its totient is φ = 2098086096.

The previous prime is 2098177789. The next prime is 2098177841. The reversal of 2098177817 is 7187718902.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1389500176 + 708677641 = 37276^2 + 26621^2 .

It is a cyclic number.

It is not a de Polignac number, because 2098177817 - 2²⁶ = 2031068953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2098177517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19559 + ... + 67667.

It is an arithmetic number, because the mean of its divisors is an integer number (524567385).

Almost surely, 2^2098177817 is an apocalyptic number.

It is an amenable number.

2098177817 is a deficient number, since it is larger than the sum of its proper divisors (91723).

2098177817 is an equidigital number, since it uses as much as digits as its factorization.

2098177817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91722.

The product of its (nonzero) digits is 395136, while the sum is 50.

The square root of 2098177817 is about 45805.8709883351. The cubic root of 2098177817 is about 1280.2086689833.

The spelling of 2098177817 in words is "two billion, ninety-eight million, one hundred seventy-seven thousand, eight hundred seventeen".