998251559 has 8 divisors (see below), whose sum is σ = 1037864688. Its totient is φ = 959365440.

The previous prime is 998251547. The next prime is 998251591. The reversal of 998251559 is 955152899.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 998251559 - 2¹⁶ = 998186023 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 998251559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998271559) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 178952 + ... + 184445.

It is an arithmetic number, because the mean of its divisors is an integer number (129733086).

Almost surely, 2^998251559 is an apocalyptic number.

998251559 is a deficient number, since it is larger than the sum of its proper divisors (39613129).

998251559 is a wasteful number, since it uses less digits than its factorization.

998251559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363505.

The product of its digits is 1458000, while the sum is 53.

The square root of 998251559 is about 31595.1192275009. The cubic root of 998251559 is about 999.4168463312.

The spelling of 998251559 in words is "nine hundred ninety-eight million, two hundred fifty-one thousand, five hundred fifty-nine".