1685345594 has 4 divisors (see below), whose sum is σ = 2528018394. Its totient is φ = 842672796.

The previous prime is 1685345573. The next prime is 1685345603. The reversal of 1685345594 is 4955435861.

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

It can be written as a sum of positive squares in only one way, i.e., 1653479569 + 31866025 = 40663^2 + 5645^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421336397 + ... + 421336400.

Almost surely, 2^1685345594 is an apocalyptic number.

1685345594 is a deficient number, since it is larger than the sum of its proper divisors (842672800).

1685345594 is an equidigital number, since it uses as much as digits as its factorization.

1685345594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842672799.

The product of its digits is 2592000, while the sum is 50.

The square root of 1685345594 is about 41052.9608432815. The cubic root of 1685345594 is about 1190.0439204184.

The spelling of 1685345594 in words is "one billion, six hundred eighty-five million, three hundred forty-five thousand, five hundred ninety-four".