1685702243 has 8 divisors (see below), whose sum is σ = 1715909520. Its totient is φ = 1655578080.

The previous prime is 1685702233. The next prime is 1685702251. The reversal of 1685702243 is 3422075861.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1685702243 - 2²² = 1681507939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1685702197 and 1685702206.

It is not an unprimeable number, because it can be changed into a prime (1685702233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20888 + ... + 61706.

It is an arithmetic number, because the mean of its divisors is an integer number (214488690).

Almost surely, 2^1685702243 is an apocalyptic number.

1685702243 is a deficient number, since it is larger than the sum of its proper divisors (30207277).

1685702243 is an equidigital number, since it uses as much as digits as its factorization.

1685702243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41557.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 1685702243 is about 41057.3043805849. The cubic root of 1685702243 is about 1190.1278592933.

The spelling of 1685702243 in words is "one billion, six hundred eighty-five million, seven hundred two thousand, two hundred forty-three".