1684630825 has 6 divisors (see below), whose sum is σ = 2088942254. Its totient is φ = 1347704640.

The previous prime is 1684630819. The next prime is 1684630841. The reversal of 1684630825 is 5280364861.

It can be written as a sum of positive squares in 3 ways, for example, as 8219689 + 1676411136 = 2867^2 + 40944^2 .

It is not a de Polignac number, because 1684630825 - 2⁷ = 1684630697 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33692592 + ... + 33692641.

Almost surely, 2^1684630825 is an apocalyptic number.

It is an amenable number.

1684630825 is a deficient number, since it is larger than the sum of its proper divisors (404311429).

1684630825 is an equidigital number, since it uses as much as digits as its factorization.

1684630825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67385243 (or 67385238 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 43.

The square root of 1684630825 is about 41044.2544700230. The cubic root of 1684630825 is about 1189.8756608076.

The spelling of 1684630825 in words is "one billion, six hundred eighty-four million, six hundred thirty thousand, eight hundred twenty-five".