998730161 has 32 divisors (see below), whose sum is σ = 1247291136. Its totient is φ = 785664000.

The previous prime is 998730133. The next prime is 998730181. The reversal of 998730161 is 161037899.

It is not a de Polignac number, because 998730161 - 2⁶ = 998730097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (998730181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 755381 + ... + 756701.

It is an arithmetic number, because the mean of its divisors is an integer number (38977848).

Almost surely, 2^998730161 is an apocalyptic number.

It is an amenable number.

998730161 is a deficient number, since it is larger than the sum of its proper divisors (248560975).

998730161 is a wasteful number, since it uses less digits than its factorization.

998730161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1673.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 998730161 is about 31602.6923061944. The cubic root of 998730161 is about 999.5765410412.

The spelling of 998730161 in words is "nine hundred ninety-eight million, seven hundred thirty thousand, one hundred sixty-one".