8121898 has 16 divisors (see below), whose sum is σ = 12773376. Its totient is φ = 3865840.

The previous prime is 8121889. The next prime is 8121901. The reversal of 8121898 is 8981218.

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 7 ways as a sum of consecutive naturals, for example, 17388 + ... + 17848.

It is an arithmetic number, because the mean of its divisors is an integer number (798336).

Almost surely, 2^8121898 is an apocalyptic number.

8121898 is a deficient number, since it is larger than the sum of its proper divisors (4651478).

8121898 is a wasteful number, since it uses less digits than its factorization.

8121898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869.

The product of its digits is 9216, while the sum is 37.

The square root of 8121898 is about 2849.8943840079. The cubic root of 8121898 is about 201.0107004856.

The spelling of 8121898 in words is "eight million, one hundred twenty-one thousand, eight hundred ninety-eight".