1680544253 has 2 divisors, whose sum is σ = 1680544254. Its totient is φ = 1680544252.

The previous prime is 1680544223. The next prime is 1680544291. The reversal of 1680544253 is 3524450861.

It is an a-pointer prime, because the next prime (1680544291) can be obtained adding 1680544253 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1549052164 + 131492089 = 39358^2 + 11467^2 .

It is an emirp because it is prime and its reverse (3524450861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1680544253 - 2²⁴ = 1663767037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1680544223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840272126 + 840272127.

It is an arithmetic number, because the mean of its divisors is an integer number (840272127).

Almost surely, 2^1680544253 is an apocalyptic number.

It is an amenable number.

1680544253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680544253 is an equidigital number, since it uses as much as digits as its factorization.

1680544253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 115200, while the sum is 38.

The square root of 1680544253 is about 40994.4417329960. The cubic root of 1680544253 is about 1188.9127496034.

The spelling of 1680544253 in words is "one billion, six hundred eighty million, five hundred forty-four thousand, two hundred fifty-three".