1685829601 has 4 divisors (see below), whose sum is σ = 1685962692. Its totient is φ = 1685696512.

The previous prime is 1685829571. The next prime is 1685829637. The reversal of 1685829601 is 1069285861.

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 962488576 + 723341025 = 31024^2 + 26895^2 .

It is a cyclic number.

It is not a de Polignac number, because 1685829601 - 2¹⁹ = 1685305313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1685829401) 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 in 3 ways as a sum of consecutive naturals, for example, 45280 + ... + 73633.

It is an arithmetic number, because the mean of its divisors is an integer number (421490673).

Almost surely, 2^1685829601 is an apocalyptic number.

It is an amenable number.

1685829601 is a deficient number, since it is larger than the sum of its proper divisors (133091).

1685829601 is a wasteful number, since it uses less digits than its factorization.

1685829601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133090.

The product of its (nonzero) digits is 207360, while the sum is 46.

The square root of 1685829601 is about 41058.8553298798. The cubic root of 1685829601 is about 1190.1578306771.

The spelling of 1685829601 in words is "one billion, six hundred eighty-five million, eight hundred twenty-nine thousand, six hundred one".