1680622189 has 4 divisors (see below), whose sum is σ = 1734835840. Its totient is φ = 1626408540.

The previous prime is 1680622147. The next prime is 1680622231. The reversal of 1680622189 is 9812260861.

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: 9812260861 = 13 ⋅754789297.

It is an interprime number because it is at equal distance from previous prime (1680622147) and next prime (1680622231).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1680622189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680622109) 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 in 3 ways as a sum of consecutive naturals, for example, 27106779 + ... + 27106840.

It is an arithmetic number, because the mean of its divisors is an integer number (433708960).

Almost surely, 2^1680622189 is an apocalyptic number.

It is an amenable number.

1680622189 is a deficient number, since it is larger than the sum of its proper divisors (54213651).

1680622189 is an equidigital number, since it uses as much as digits as its factorization.

1680622189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54213650.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 1680622189 is about 40995.3922898659. The cubic root of 1680622189 is about 1188.9311281082.

The spelling of 1680622189 in words is "one billion, six hundred eighty million, six hundred twenty-two thousand, one hundred eighty-nine".