998074561 has 8 divisors (see below), whose sum is σ = 1092102048. Its totient is φ = 904596000.

The previous prime is 998074549. The next prime is 998074601. The reversal of 998074561 is 165470899.

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

It is not a de Polignac number, because 998074561 - 2¹¹ = 998072513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998074501) 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, 133420 + ... + 140701.

It is an arithmetic number, because the mean of its divisors is an integer number (136512756).

Almost surely, 2^998074561 is an apocalyptic number.

It is an amenable number.

998074561 is a deficient number, since it is larger than the sum of its proper divisors (94027487).

998074561 is a wasteful number, since it uses less digits than its factorization.

998074561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274463.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 998074561 is about 31592.3180694295. The cubic root of 998074561 is about 999.3577746349.

The spelling of 998074561 in words is "nine hundred ninety-eight million, seventy-four thousand, five hundred sixty-one".