998187669 has 24 divisors (see below), whose sum is σ = 1455118392. Its totient is φ = 659352960.

The previous prime is 998187613. The next prime is 998187677. The reversal of 998187669 is 966781899.

It can be written as a sum of positive squares in 4 ways, for example, as 16305444 + 981882225 = 4038^2 + 31335^2 .

It is not a de Polignac number, because 998187669 - 2¹¹ = 998185621 is a prime.

It is a super-2 number, since 2×998187669² = 1992757245087307122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998187679) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 515427 + ... + 517359.

It is an arithmetic number, because the mean of its divisors is an integer number (60629933).

Almost surely, 2^998187669 is an apocalyptic number.

It is an amenable number.

998187669 is a deficient number, since it is larger than the sum of its proper divisors (456930723).

998187669 is a wasteful number, since it uses less digits than its factorization.

998187669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2437 (or 2434 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 63.

The square root of 998187669 is about 31594.1081374360. The cubic root of 998187669 is about 999.3955243495.

The spelling of 998187669 in words is "nine hundred ninety-eight million, one hundred eighty-seven thousand, six hundred sixty-nine".