1680472489 has 2 divisors, whose sum is σ = 1680472490. Its totient is φ = 1680472488.

The previous prime is 1680472481. The next prime is 1680472513. The reversal of 1680472489 is 9842740861.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1513210000 + 167262489 = 38900^2 + 12933^2 .

It is an emirp because it is prime and its reverse (9842740861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1680472489 - 2³ = 1680472481 is a prime.

It is not a weakly prime, because it can be changed into another prime (1680472481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840236244 + 840236245.

It is an arithmetic number, because the mean of its divisors is an integer number (840236245).

Almost surely, 2^1680472489 is an apocalyptic number.

It is an amenable number.

1680472489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680472489 is an equidigital number, since it uses as much as digits as its factorization.

1680472489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 774144, while the sum is 49.

The square root of 1680472489 is about 40993.5664342589. The cubic root of 1680472489 is about 1188.8958260485.

The spelling of 1680472489 in words is "one billion, six hundred eighty million, four hundred seventy-two thousand, four hundred eighty-nine".