1693435685 has 4 divisors (see below), whose sum is σ = 2032122828. Its totient is φ = 1354748544.

The previous prime is 1693435661. The next prime is 1693435687. The reversal of 1693435685 is 5865343961.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 257859364 + 1435576321 = 16058^2 + 37889^2 .

It is a cyclic number.

It is not a de Polignac number, because 1693435685 - 2⁶ = 1693435621 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 (1693435687) 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, 169343564 + ... + 169343573.

It is an arithmetic number, because the mean of its divisors is an integer number (508030707).

Almost surely, 2^1693435685 is an apocalyptic number.

It is an amenable number.

1693435685 is a deficient number, since it is larger than the sum of its proper divisors (338687143).

1693435685 is an equidigital number, since it uses as much as digits as its factorization.

1693435685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338687142.

The product of its digits is 2332800, while the sum is 50.

The square root of 1693435685 is about 41151.3752504093. The cubic root of 1693435685 is about 1191.9450536678.

The spelling of 1693435685 in words is "one billion, six hundred ninety-three million, four hundred thirty-five thousand, six hundred eighty-five".