998350681 has 8 divisors (see below), whose sum is σ = 1009481760. Its totient is φ = 987276288.

The previous prime is 998350679. The next prime is 998350693. The reversal of 998350681 is 186053899.

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 998350681 - 2¹ = 998350679 is a prime.

It is a super-2 number, since 2×998350681² = 1993408164506327522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998350621) 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 7 ways as a sum of consecutive naturals, for example, 21750 + ... + 49696.

It is an arithmetic number, because the mean of its divisors is an integer number (126185220).

Almost surely, 2^998350681 is an apocalyptic number.

998350681 is the 19984-th centered pentagonal number.

It is an amenable number.

998350681 is a deficient number, since it is larger than the sum of its proper divisors (11131079).

998350681 is a wasteful number, since it uses less digits than its factorization.

998350681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28343.

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 998350681 is about 31596.6878169216. The cubic root of 998350681 is about 999.4499244724.

The spelling of 998350681 in words is "nine hundred ninety-eight million, three hundred fifty thousand, six hundred eighty-one".