1998709419 has 8 divisors (see below), whose sum is σ = 3045652480. Its totient is φ = 1142119656.

The previous prime is 1998709411. The next prime is 1998709441. The reversal of 1998709419 is 9149078991.

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

It is not a de Polignac number, because 1998709419 - 2³ = 1998709411 is a prime.

It is a super-2 number, since 2×1998709419² = 7989678683198635122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1998709411) 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, 47588299 + ... + 47588340.

It is an arithmetic number, because the mean of its divisors is an integer number (380706560).

Almost surely, 2^1998709419 is an apocalyptic number.

1998709419 is a deficient number, since it is larger than the sum of its proper divisors (1046943061).

1998709419 is an equidigital number, since it uses as much as digits as its factorization.

1998709419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95176649.

The product of its (nonzero) digits is 1469664, while the sum is 57.

The square root of 1998709419 is about 44706.9280872663. The cubic root of 1998709419 is about 1259.6499865536.

The spelling of 1998709419 in words is "one billion, nine hundred ninety-eight million, seven hundred nine thousand, four hundred nineteen".