998795161 has 32 divisors (see below), whose sum is σ = 1249145856. Its totient is φ = 777600000.

The previous prime is 998795159. The next prime is 998795299. The reversal of 998795161 is 161597899.

It is a 5-Lehmer number, since φ(998795161) divides (998795161-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 998795161 - 2¹ = 998795159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (998795141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2490561 + ... + 2490961.

It is an arithmetic number, because the mean of its divisors is an integer number (39035808).

Almost surely, 2^998795161 is an apocalyptic number.

998795161 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

998795161 is a deficient number, since it is larger than the sum of its proper divisors (250350695).

998795161 is a wasteful number, since it uses less digits than its factorization.

998795161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793.

The product of its digits is 1224720, while the sum is 55.

The square root of 998795161 is about 31603.7206828563. The cubic root of 998795161 is about 999.5982255989.

The spelling of 998795161 in words is "nine hundred ninety-eight million, seven hundred ninety-five thousand, one hundred sixty-one".