8398161 has 10 divisors (see below), whose sum is σ = 12545522. Its totient is φ = 5598720.

The previous prime is 8398147. The next prime is 8398177. The reversal of 8398161 is 1618938.

It can be written as a sum of positive squares in only one way, i.e., 6350400 + 2047761 = 2520^2 + 1431^2 .

It is not a de Polignac number, because 8398161 - 2⁶ = 8398097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8398111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 51760 + ... + 51921.

Almost surely, 2^8398161 is an apocalyptic number.

8398161 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

8398161 is a deficient number, since it is larger than the sum of its proper divisors (4147361).

8398161 is a wasteful number, since it uses less digits than its factorization.

8398161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103693 (or 103684 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 8398161 is about 2897.9580742309. The cubic root of 8398161 is about 203.2644357334.

The spelling of 8398161 in words is "eight million, three hundred ninety-eight thousand, one hundred sixty-one".