1894838489 has 2 divisors, whose sum is σ = 1894838490. Its totient is φ = 1894838488.

The previous prime is 1894838471. The next prime is 1894838527. The reversal of 1894838489 is 9848384981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1706929225 + 187909264 = 41315^2 + 13708^2 .

It is an emirp because it is prime and its reverse (9848384981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1894838489 - 2²⁰ = 1893789913 is a prime.

It is not a weakly prime, because it can be changed into another prime (1894838419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 947419244 + 947419245.

It is an arithmetic number, because the mean of its divisors is an integer number (947419245).

Almost surely, 2^1894838489 is an apocalyptic number.

It is an amenable number.

1894838489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1894838489 is an equidigital number, since it uses as much as digits as its factorization.

1894838489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15925248, while the sum is 62.

The square root of 1894838489 is about 43529.7425790689. The cubic root of 1894838489 is about 1237.4397593231.

The spelling of 1894838489 in words is "one billion, eight hundred ninety-four million, eight hundred thirty-eight thousand, four hundred eighty-nine".