998547975 has 72 divisors (see below), whose sum is σ = 1857024000. Its totient is φ = 512366400.

The previous prime is 998547917. The next prime is 998547997. The reversal of 998547975 is 579745899.

998547975 is a `hidden beast` number, since 9 + 98 + 5 + 479 + 75 = 666.

It is not a de Polignac number, because 998547975 - 2⁶ = 998547911 is a prime.

It is a congruent number.

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 in 71 ways as a sum of consecutive naturals, for example, 1666726 + ... + 1667324.

It is an arithmetic number, because the mean of its divisors is an integer number (25792000).

Almost surely, 2^998547975 is an apocalyptic number.

998547975 is a deficient number, since it is larger than the sum of its proper divisors (858476025).

998547975 is a wasteful number, since it uses less digits than its factorization.

998547975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885 (or 877 counting only the distinct ones).

The product of its digits is 28576800, while the sum is 63.

The square root of 998547975 is about 31599.8097304398. The cubic root of 998547975 is about 999.5157572134.

The spelling of 998547975 in words is "nine hundred ninety-eight million, five hundred forty-seven thousand, nine hundred seventy-five".