1680163963 has 2 divisors, whose sum is σ = 1680163964. Its totient is φ = 1680163962.

The previous prime is 1680163889. The next prime is 1680163967. The reversal of 1680163963 is 3693610861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1680163963 - 2²¹ = 1678066811 is a prime.

It is not a weakly prime, because it can be changed into another prime (1680163967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840081981 + 840081982.

It is an arithmetic number, because the mean of its divisors is an integer number (840081982).

Almost surely, 2^1680163963 is an apocalyptic number.

1680163963 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680163963 is an equidigital number, since it uses as much as digits as its factorization.

1680163963 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 1680163963 is about 40989.8031588345. The cubic root of 1680163963 is about 1188.8230632340.

The spelling of 1680163963 in words is "one billion, six hundred eighty million, one hundred sixty-three thousand, nine hundred sixty-three".