1989935498 has 4 divisors (see below), whose sum is σ = 2984903250. Its totient is φ = 994967748.

The previous prime is 1989935471. The next prime is 1989935567. The reversal of 1989935498 is 8945399891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8945399891 = 5449 ⋅1641659.

It can be written as a sum of positive squares in only one way, i.e., 1685677249 + 304258249 = 41057^2 + 17443^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497483873 + ... + 497483876.

Almost surely, 2^1989935498 is an apocalyptic number.

1989935498 is a deficient number, since it is larger than the sum of its proper divisors (994967752).

1989935498 is an equidigital number, since it uses as much as digits as its factorization.

1989935498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994967751.

The product of its digits is 25194240, while the sum is 65.

The square root of 1989935498 is about 44608.6930765742. The cubic root of 1989935498 is about 1257.8040818879.

The spelling of 1989935498 in words is "one billion, nine hundred eighty-nine million, nine hundred thirty-five thousand, four hundred ninety-eight".