998173539 has 48 divisors (see below), whose sum is σ = 1610635104. Its totient is φ = 590553600.

The previous prime is 998173507. The next prime is 998173549. The reversal of 998173539 is 935371899.

998173539 is a `hidden beast` number, since 9 + 98 + 17 + 3 + 539 = 666.

It is not a de Polignac number, because 998173539 - 2⁵ = 998173507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (998173549) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1474069 + ... + 1474745.

It is an arithmetic number, because the mean of its divisors is an integer number (33554898).

Almost surely, 2^998173539 is an apocalyptic number.

998173539 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

998173539 is a deficient number, since it is larger than the sum of its proper divisors (612461565).

998173539 is a wasteful number, since it uses less digits than its factorization.

998173539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028 (or 1025 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 54.

The square root of 998173539 is about 31593.8845190015. The cubic root of 998173539 is about 999.3908086279.

The spelling of 998173539 in words is "nine hundred ninety-eight million, one hundred seventy-three thousand, five hundred thirty-nine".