1999904498 has 4 divisors (see below), whose sum is σ = 2999856750. Its totient is φ = 999952248.

The previous prime is 1999904479. The next prime is 1999904521. The reversal of 1999904498 is 8944099991.

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., 1358143609 + 641760889 = 36853^2 + 25333^2 .

It is a super-2 number, since 2×1999904498² = 7999236002241264008, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1999904498.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499976123 + ... + 499976126.

Almost surely, 2^1999904498 is an apocalyptic number.

1999904498 is a deficient number, since it is larger than the sum of its proper divisors (999952252).

1999904498 is an equidigital number, since it uses as much as digits as its factorization.

1999904498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999952251.

The product of its (nonzero) digits is 7558272, while the sum is 62.

The square root of 1999904498 is about 44720.2917924291. The cubic root of 1999904498 is about 1259.9009954123.

The spelling of 1999904498 in words is "one billion, nine hundred ninety-nine million, nine hundred four thousand, four hundred ninety-eight".