998674165 has 4 divisors (see below), whose sum is σ = 1198409004. Its totient is φ = 798939328.

The previous prime is 998674147. The next prime is 998674169. The reversal of 998674165 is 561476899.

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 337052881 + 661621284 = 18359^2 + 25722^2 .

It is a cyclic number.

It is not a de Polignac number, because 998674165 - 2⁵ = 998674133 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 (998674169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99867412 + ... + 99867421.

It is an arithmetic number, because the mean of its divisors is an integer number (299602251).

Almost surely, 2^998674165 is an apocalyptic number.

It is an amenable number.

998674165 is a deficient number, since it is larger than the sum of its proper divisors (199734839).

998674165 is a wasteful number, since it uses less digits than its factorization.

998674165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199734838.

The product of its digits is 3265920, while the sum is 55.

The square root of 998674165 is about 31601.8063565993. The cubic root of 998674165 is about 999.5578595406.

The spelling of 998674165 in words is "nine hundred ninety-eight million, six hundred seventy-four thousand, one hundred sixty-five".