1681767371 has 2 divisors, whose sum is σ = 1681767372. Its totient is φ = 1681767370.

The previous prime is 1681767359. The next prime is 1681767379. The reversal of 1681767371 is 1737671861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1681767371 - 2¹⁸ = 1681505227 is a prime.

It is not a weakly prime, because it can be changed into another prime (1681767379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840883685 + 840883686.

It is an arithmetic number, because the mean of its divisors is an integer number (840883686).

Almost surely, 2^1681767371 is an apocalyptic number.

1681767371 is a deficient number, since it is larger than the sum of its proper divisors (1).

1681767371 is an equidigital number, since it uses as much as digits as its factorization.

1681767371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 296352, while the sum is 47.

The square root of 1681767371 is about 41009.3571151756. The cubic root of 1681767371 is about 1189.2011141090.

The spelling of 1681767371 in words is "one billion, six hundred eighty-one million, seven hundred sixty-seven thousand, three hundred seventy-one".