2098217591 has 2 divisors, whose sum is σ = 2098217592. Its totient is φ = 2098217590.

The previous prime is 2098217587. The next prime is 2098217603. The reversal of 2098217591 is 1957128902.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2098217591 - 2² = 2098217587 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2098210591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1049108795 + 1049108796.

It is an arithmetic number, because the mean of its divisors is an integer number (1049108796).

Almost surely, 2^2098217591 is an apocalyptic number.

2098217591 is the 24485-th centered heptagonal number.

2098217591 is a deficient number, since it is larger than the sum of its proper divisors (1).

2098217591 is an equidigital number, since it uses as much as digits as its factorization.

2098217591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 2098217591 is about 45806.3051445977. The cubic root of 2098217591 is about 1280.2167583355.

The spelling of 2098217591 in words is "two billion, ninety-eight million, two hundred seventeen thousand, five hundred ninety-one".