2098999665 has 48 divisors (see below), whose sum is σ = 4338816768. Its totient is φ = 917820288.

The previous prime is 2098999621. The next prime is 2098999667. The reversal of 2098999665 is 5669998902.

It is not a de Polignac number, because 2098999665 - 2⁶ = 2098999601 is a prime.

It is a super-2 number, since 2×2098999665² = 8811599187340224450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2098999667) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 137614 + ... + 152103.

It is an arithmetic number, because the mean of its divisors is an integer number (90392016).

Almost surely, 2^2098999665 is an apocalyptic number.

It is an amenable number.

2098999665 is an abundant number, since it is smaller than the sum of its proper divisors (2239817103).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2098999665 is a wasteful number, since it uses less digits than its factorization.

2098999665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289758 (or 289755 counting only the distinct ones).

The product of its (nonzero) digits is 18895680, while the sum is 63.

The square root of 2098999665 is about 45814.8410998008. The cubic root of 2098999665 is about 1280.3757980644.

The spelling of 2098999665 in words is "two billion, ninety-eight million, nine hundred ninety-nine thousand, six hundred sixty-five".