6531898 has 4 divisors (see below), whose sum is σ = 9797850. Its totient is φ = 3265948.

The previous prime is 6531887. The next prime is 6531907. The reversal of 6531898 is 8981356.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5870929 + 660969 = 2423^2 + 813^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 6531898.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1632973 + ... + 1632976.

Almost surely, 2^6531898 is an apocalyptic number.

6531898 is a deficient number, since it is larger than the sum of its proper divisors (3265952).

6531898 is a wasteful number, since it uses less digits than its factorization.

6531898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3265951.

The product of its digits is 51840, while the sum is 40.

The square root of 6531898 is about 2555.7578132523. The cubic root of 6531898 is about 186.9303409510.

The spelling of 6531898 in words is "six million, five hundred thirty-one thousand, eight hundred ninety-eight".