1685536823 has 2 divisors, whose sum is σ = 1685536824. Its totient is φ = 1685536822.

The previous prime is 1685536817. The next prime is 1685536837. The reversal of 1685536823 is 3286355861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1685536823 - 2²² = 1681342519 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1685536843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842768411 + 842768412.

It is an arithmetic number, because the mean of its divisors is an integer number (842768412).

Almost surely, 2^1685536823 is an apocalyptic number.

1685536823 is a deficient number, since it is larger than the sum of its proper divisors (1).

1685536823 is an equidigital number, since it uses as much as digits as its factorization.

1685536823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1036800, while the sum is 47.

The square root of 1685536823 is about 41055.2898296919. The cubic root of 1685536823 is about 1190.0889284577.

The spelling of 1685536823 in words is "one billion, six hundred eighty-five million, five hundred thirty-six thousand, eight hundred twenty-three".