1988519474 has 4 divisors (see below), whose sum is σ = 2982779214. Its totient is φ = 994259736.

The previous prime is 1988519437. The next prime is 1988519479. The reversal of 1988519474 is 4749158891.

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

It can be written as a sum of positive squares in only one way, i.e., 1930987249 + 57532225 = 43943^2 + 7585^2 .

It is not an unprimeable number, because it can be changed into a prime (1988519479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497129867 + ... + 497129870.

Almost surely, 2^1988519474 is an apocalyptic number.

1988519474 is a deficient number, since it is larger than the sum of its proper divisors (994259740).

1988519474 is an equidigital number, since it uses as much as digits as its factorization.

1988519474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994259739.

The product of its digits is 2903040, while the sum is 56.

The square root of 1988519474 is about 44592.8186370855. The cubic root of 1988519474 is about 1257.5056629351.

The spelling of 1988519474 in words is "one billion, nine hundred eighty-eight million, five hundred nineteen thousand, four hundred seventy-four".