998401019 has 18 divisors (see below), whose sum is σ = 1267919172. Its totient is φ = 777403200.

The previous prime is 998400967. The next prime is 998401031. The reversal of 998401019 is 910104899.

It is not a de Polignac number, because 998401019 - 2¹⁶ = 998335483 is a prime.

It is a super-2 number, since 2×998401019² = 1993609189480476722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998401099) 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, 732899 + ... + 734259.

It is an arithmetic number, because the mean of its divisors is an integer number (70439954).

Almost surely, 2^998401019 is an apocalyptic number.

998401019 is a deficient number, since it is larger than the sum of its proper divisors (269518153).

998401019 is an equidigital number, since it uses as much as digits as its factorization.

998401019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2747 (or 1379 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 998401019 is about 31597.4843777159. The cubic root of 998401019 is about 999.4667219985.

The spelling of 998401019 in words is "nine hundred ninety-eight million, four hundred one thousand, nineteen".