1705399 has 2 divisors, whose sum is σ = 1705400. Its totient is φ = 1705398.

The previous prime is 1705397. The next prime is 1705409. The reversal of 1705399 is 9935071.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1705399 - 2¹ = 1705397 is a prime.

Together with 1705397, it forms a pair of twin primes.

1705399 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1705393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 852699 + 852700.

It is an arithmetic number, because the mean of its divisors is an integer number (852700).

2^1705399 is an apocalyptic number.

1705399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1705399 is an equidigital number, since it uses as much as digits as its factorization.

1705399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8505, while the sum is 34.

The square root of 1705399 is about 1305.9092617789. The cubic root of 1705399 is about 119.4745310824.

The spelling of 1705399 in words is "one million, seven hundred five thousand, three hundred ninety-nine".