998021067 has 4 divisors (see below), whose sum is σ = 1330694760. Its totient is φ = 665347376.

The previous prime is 998021041. The next prime is 998021093. The reversal of 998021067 is 760120899.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (998021041) and next prime (998021093).

It is a cyclic number.

It is not a de Polignac number, because 998021067 - 2¹⁹ = 997496779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (998021867) 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, 166336842 + ... + 166336847.

It is an arithmetic number, because the mean of its divisors is an integer number (332673690).

Almost surely, 2^998021067 is an apocalyptic number.

998021067 is a deficient number, since it is larger than the sum of its proper divisors (332673693).

998021067 is a wasteful number, since it uses less digits than its factorization.

998021067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332673692.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 998021067 is about 31591.4714282194. The cubic root of 998021067 is about 999.3399200570.

The spelling of 998021067 in words is "nine hundred ninety-eight million, twenty-one thousand, sixty-seven".