998421147 has 18 divisors (see below), whose sum is σ = 1496315548. Its totient is φ = 665285724.

The previous prime is 998421133. The next prime is 998421163. The reversal of 998421147 is 741124899.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 998421147 - 2¹¹ = 998419099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998421167) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 491548 + ... + 493574.

Almost surely, 2^998421147 is an apocalyptic number.

998421147 is a deficient number, since it is larger than the sum of its proper divisors (497894401).

998421147 is an frugal number, since it uses more digits than its factorization.

998421147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4069 (or 2030 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 998421147 is about 31597.8028824790. The cubic root of 998421147 is about 999.4734384483.

The spelling of 998421147 in words is "nine hundred ninety-eight million, four hundred twenty-one thousand, one hundred forty-seven".