998945479 has 16 divisors (see below), whose sum is σ = 1160006400. Its totient is φ = 842575104.

The previous prime is 998945477. The next prime is 998945489. The reversal of 998945479 is 974549899.

It is not a de Polignac number, because 998945479 - 2¹ = 998945477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 998945479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998945477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117432 + ... + 125650.

It is an arithmetic number, because the mean of its divisors is an integer number (72500400).

Almost surely, 2^998945479 is an apocalyptic number.

998945479 is a deficient number, since it is larger than the sum of its proper divisors (161060921).

998945479 is a wasteful number, since it uses less digits than its factorization.

998945479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8502.

The product of its digits is 29393280, while the sum is 64.

The square root of 998945479 is about 31606.0987627388. The cubic root of 998945479 is about 999.6483693704.

The spelling of 998945479 in words is "nine hundred ninety-eight million, nine hundred forty-five thousand, four hundred seventy-nine".