1685093173 has 4 divisors (see below), whose sum is σ = 1685802688. Its totient is φ = 1684383660.

The previous prime is 1685093171. The next prime is 1685093251. The reversal of 1685093173 is 3713905861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3713905861 = 5443 ⋅682327.

It is a cyclic number.

It is not a de Polignac number, because 1685093173 - 2¹ = 1685093171 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685093171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351183 + ... + 355948.

It is an arithmetic number, because the mean of its divisors is an integer number (421450672).

Almost surely, 2^1685093173 is an apocalyptic number.

It is an amenable number.

1685093173 is a deficient number, since it is larger than the sum of its proper divisors (709515).

1685093173 is an equidigital number, since it uses as much as digits as its factorization.

1685093173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709514.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 1685093173 is about 41049.8863944835. The cubic root of 1685093173 is about 1189.9845048944.

The spelling of 1685093173 in words is "one billion, six hundred eighty-five million, ninety-three thousand, one hundred seventy-three".