1687313429 has 2 divisors, whose sum is σ = 1687313430. Its totient is φ = 1687313428.

The previous prime is 1687313423. The next prime is 1687313443. The reversal of 1687313429 is 9243137861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1526074225 + 161239204 = 39065^2 + 12698^2 .

It is a cyclic number.

It is not a de Polignac number, because 1687313429 - 2⁴ = 1687313413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1687313429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1687313423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 843656714 + 843656715.

It is an arithmetic number, because the mean of its divisors is an integer number (843656715).

Almost surely, 2^1687313429 is an apocalyptic number.

It is an amenable number.

1687313429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1687313429 is an equidigital number, since it uses as much as digits as its factorization.

1687313429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 44.

The square root of 1687313429 is about 41076.9208802218. The cubic root of 1687313429 is about 1190.5069113588.

The spelling of 1687313429 in words is "one billion, six hundred eighty-seven million, three hundred thirteen thousand, four hundred twenty-nine".