8161898 has 8 divisors (see below), whose sum is σ = 12255300. Its totient is φ = 4076800.

The previous prime is 8161889. The next prime is 8161903. The reversal of 8161898 is 8981618.

It can be written as a sum of positive squares in 2 ways, for example, as 5396329 + 2765569 = 2323^2 + 1663^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1928 + ... + 4476.

Almost surely, 2^8161898 is an apocalyptic number.

8161898 is a deficient number, since it is larger than the sum of its proper divisors (4093402).

8161898 is a wasteful number, since it uses less digits than its factorization.

8161898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4152.

The product of its digits is 27648, while the sum is 41.

The square root of 8161898 is about 2856.9035685511. The cubic root of 8161898 is about 201.3401499332.

The spelling of 8161898 in words is "eight million, one hundred sixty-one thousand, eight hundred ninety-eight".