1874381681 has 2 divisors, whose sum is σ = 1874381682. Its totient is φ = 1874381680.

The previous prime is 1874381659. The next prime is 1874381683. The reversal of 1874381681 is 1861834781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1460462656 + 413919025 = 38216^2 + 20345^2 .

It is a cyclic number.

It is not a de Polignac number, because 1874381681 - 2⁶ = 1874381617 is a prime.

It is a super-2 number, since 2×1874381681² = 7026613372136771522, which contains 22 as substring.

Together with 1874381683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1874381683) 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, 937190840 + 937190841.

It is an arithmetic number, because the mean of its divisors is an integer number (937190841).

Almost surely, 2^1874381681 is an apocalyptic number.

It is an amenable number.

1874381681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1874381681 is an equidigital number, since it uses as much as digits as its factorization.

1874381681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 258048, while the sum is 47.

The square root of 1874381681 is about 43294.1298676853. The cubic root of 1874381681 is about 1232.9704750819.

The spelling of 1874381681 in words is "one billion, eight hundred seventy-four million, three hundred eighty-one thousand, six hundred eighty-one".