1681952203 has 2 divisors, whose sum is σ = 1681952204. Its totient is φ = 1681952202.

The previous prime is 1681952201. The next prime is 1681952221. The reversal of 1681952203 is 3022591861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1681952203 - 2¹ = 1681952201 is a prime.

Together with 1681952201, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1681952201) 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 as a sum of consecutive naturals, namely, 840976101 + 840976102.

It is an arithmetic number, because the mean of its divisors is an integer number (840976102).

Almost surely, 2^1681952203 is an apocalyptic number.

1681952203 is a deficient number, since it is larger than the sum of its proper divisors (1).

1681952203 is an equidigital number, since it uses as much as digits as its factorization.

1681952203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 1681952203 is about 41011.6105877348. The cubic root of 1681952203 is about 1189.2446782729.

The spelling of 1681952203 in words is "one billion, six hundred eighty-one million, nine hundred fifty-two thousand, two hundred three".