998799165 has 96 divisors (see below), whose sum is σ = 2143604736. Its totient is φ = 418936320.

The previous prime is 998799143. The next prime is 998799167. The reversal of 998799165 is 561997899.

998799165 is a nontrivial binomial coefficient, being equal to C(44695, 2).

It is not a de Polignac number, because 998799165 - 2⁷ = 998799037 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998799167) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 781507 + ... + 782783.

It is an arithmetic number, because the mean of its divisors is an integer number (22329216).

Almost surely, 2^998799165 is an apocalyptic number.

998799165 is the 44694-th triangular number.

It is an amenable number.

998799165 is an abundant number, since it is smaller than the sum of its proper divisors (1144805571).

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

998799165 is a wasteful number, since it uses less digits than its factorization.

998799165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499 (or 1496 counting only the distinct ones).

The product of its digits is 11022480, while the sum is 63.

The square root of 998799165 is about 31603.7840297645. The cubic root of 998799165 is about 999.5995613369.

The spelling of 998799165 in words is "nine hundred ninety-eight million, seven hundred ninety-nine thousand, one hundred sixty-five".