1898479465 has 4 divisors (see below), whose sum is σ = 2278175364. Its totient is φ = 1518783568.

The previous prime is 1898479459. The next prime is 1898479469. The reversal of 1898479465 is 5649748981.

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

It can be written as a sum of positive squares in 2 ways, for example, as 389312361 + 1509167104 = 19731^2 + 38848^2 .

It is a cyclic number.

It is not a de Polignac number, because 1898479465 - 2¹⁷ = 1898348393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1898479469) 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 3 ways as a sum of consecutive naturals, for example, 189847942 + ... + 189847951.

It is an arithmetic number, because the mean of its divisors is an integer number (569543841).

Almost surely, 2^1898479465 is an apocalyptic number.

It is an amenable number.

1898479465 is a deficient number, since it is larger than the sum of its proper divisors (379695899).

1898479465 is an equidigital number, since it uses as much as digits as its factorization.

1898479465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379695898.

The product of its digits is 17418240, while the sum is 61.

The square root of 1898479465 is about 43571.5442117903. The cubic root of 1898479465 is about 1238.2318419145.

The spelling of 1898479465 in words is "one billion, eight hundred ninety-eight million, four hundred seventy-nine thousand, four hundred sixty-five".