1705397 has 2 divisors, whose sum is σ = 1705398. Its totient is φ = 1705396.

The previous prime is 1705393. The next prime is 1705399. The reversal of 1705397 is 7935071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1552516 + 152881 = 1246^2 + 391^2 .

It is an emirp because it is prime and its reverse (7935071) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1705397 - 2² = 1705393 is a prime.

Together with 1705399, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a nialpdrome in base 11.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 852698 + 852699.

It is an arithmetic number, because the mean of its divisors is an integer number (852699).

2^1705397 is an apocalyptic number.

It is an amenable number.

1705397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1705397 is an equidigital number, since it uses as much as digits as its factorization.

1705397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6615, while the sum is 32.

The square root of 1705397 is about 1305.9084960287. The cubic root of 1705397 is about 119.4744843780.

The spelling of 1705397 in words is "one million, seven hundred five thousand, three hundred ninety-seven".