998173541 has 4 divisors (see below), whose sum is σ = 998236800. Its totient is φ = 998110284.

The previous prime is 998173507. The next prime is 998173549. The reversal of 998173541 is 145371899.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 145371899 = 139 ⋅1045841.

It is a cyclic number.

It is not a de Polignac number, because 998173541 - 2¹⁰ = 998172517 is a prime.

It is a pancake number, because a pancake can be divided into 998173541 parts by 44680 straight cuts.

It is a Duffinian number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 13580 + ... + 46698.

It is an arithmetic number, because the mean of its divisors is an integer number (249559200).

Almost surely, 2^998173541 is an apocalyptic number.

It is an amenable number.

998173541 is a deficient number, since it is larger than the sum of its proper divisors (63259).

998173541 is a wasteful number, since it uses less digits than its factorization.

998173541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63258.

The product of its digits is 272160, while the sum is 47.

The square root of 998173541 is about 31593.8845506532. The cubic root of 998173541 is about 999.3908092954.

The spelling of 998173541 in words is "nine hundred ninety-eight million, one hundred seventy-three thousand, five hundred forty-one".