2098509081 has 8 divisors (see below), whose sum is σ = 2808414720. Its totient is φ = 1393804752.

The previous prime is 2098509073. The next prime is 2098509103. The reversal of 2098509081 is 1809058902.

It is a happy number.

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

It is not a de Polignac number, because 2098509081 - 2³ = 2098509073 is a prime.

It is a super-2 number, since 2×2098509081² = 8807480726078929122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2098509001) 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, 1299385 + ... + 1300998.

It is an arithmetic number, because the mean of its divisors is an integer number (351051840).

Almost surely, 2^2098509081 is an apocalyptic number.

It is an amenable number.

2098509081 is a deficient number, since it is larger than the sum of its proper divisors (709905639).

2098509081 is a wasteful number, since it uses less digits than its factorization.

2098509081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2600655.

The product of its (nonzero) digits is 51840, while the sum is 42.

The square root of 2098509081 is about 45809.4868013166. The cubic root of 2098509081 is about 1280.2760393025.

The spelling of 2098509081 in words is "two billion, ninety-eight million, five hundred nine thousand, eighty-one".