1705873489 has 2 divisors, whose sum is σ = 1705873490. Its totient is φ = 1705873488.

The previous prime is 1705873457. The next prime is 1705873513. The reversal of 1705873489 is 9843785071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1236717889 + 469155600 = 35167^2 + 21660^2 .

It is an emirp because it is prime and its reverse (9843785071) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1705873489 - 2⁵ = 1705873457 is a prime.

It is not a weakly prime, because it can be changed into another prime (1705870489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 852936744 + 852936745.

It is an arithmetic number, because the mean of its divisors is an integer number (852936745).

Almost surely, 2^1705873489 is an apocalyptic number.

It is an amenable number.

1705873489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1705873489 is an equidigital number, since it uses as much as digits as its factorization.

1705873489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1693440, while the sum is 52.

The square root of 1705873489 is about 41302.2213567261. The cubic root of 1705873489 is about 1194.8561042400.

The spelling of 1705873489 in words is "one billion, seven hundred five million, eight hundred seventy-three thousand, four hundred eighty-nine".