1684125697 has 4 divisors (see below), whose sum is σ = 1686266416. Its totient is φ = 1681984980.

The previous prime is 1684125679. The next prime is 1684125719. The reversal of 1684125697 is 7965214861.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7965214861 = 5701 ⋅1397161.

It is a cyclic number.

It is not a de Polignac number, because 1684125697 - 2¹⁵ = 1684092929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1684125697.

It is not an unprimeable number, because it can be changed into a prime (1684125607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1069179 + ... + 1070752.

It is an arithmetic number, because the mean of its divisors is an integer number (421566604).

Almost surely, 2^1684125697 is an apocalyptic number.

It is an amenable number.

1684125697 is a deficient number, since it is larger than the sum of its proper divisors (2140719).

1684125697 is an equidigital number, since it uses as much as digits as its factorization.

1684125697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2140718.

The product of its digits is 725760, while the sum is 49.

The square root of 1684125697 is about 41038.1005530227. The cubic root of 1684125697 is about 1189.7567228605.

The spelling of 1684125697 in words is "one billion, six hundred eighty-four million, one hundred twenty-five thousand, six hundred ninety-seven".