2898655021 has 4 divisors (see below), whose sum is σ = 2900598012. Its totient is φ = 2896712032.

The previous prime is 2898655013. The next prime is 2898655049. The reversal of 2898655021 is 1205568982.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2126593225 + 772061796 = 46115^2 + 27786^2 .

It is a cyclic number.

It is not a de Polignac number, because 2898655021 - 2³ = 2898655013 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 (2898655051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 969256 + ... + 972241.

It is an arithmetic number, because the mean of its divisors is an integer number (725149503).

Almost surely, 2^2898655021 is an apocalyptic number.

It is an amenable number.

2898655021 is a deficient number, since it is larger than the sum of its proper divisors (1942991).

2898655021 is a wasteful number, since it uses less digits than its factorization.

2898655021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1942990.

The product of its (nonzero) digits is 345600, while the sum is 46.

The square root of 2898655021 is about 53839.1588065787. The cubic root of 2898655021 is about 1425.8226535015.

The spelling of 2898655021 in words is "two billion, eight hundred ninety-eight million, six hundred fifty-five thousand, twenty-one".