1685053687 has 2 divisors, whose sum is σ = 1685053688. Its totient is φ = 1685053686.

The previous prime is 1685053681. The next prime is 1685053693. The reversal of 1685053687 is 7863505861.

It is a balanced prime because it is at equal distance from previous prime (1685053681) and next prime (1685053693).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1685053687 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1685053687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1685053681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842526843 + 842526844.

It is an arithmetic number, because the mean of its divisors is an integer number (842526844).

Almost surely, 2^1685053687 is an apocalyptic number.

1685053687 is a deficient number, since it is larger than the sum of its proper divisors (1).

1685053687 is an equidigital number, since it uses as much as digits as its factorization.

1685053687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1209600, while the sum is 49.

The square root of 1685053687 is about 41049.4054402740. The cubic root of 1685053687 is about 1189.9752100384.

The spelling of 1685053687 in words is "one billion, six hundred eighty-five million, fifty-three thousand, six hundred eighty-seven".