3781879181 has 2 divisors, whose sum is σ = 3781879182. Its totient is φ = 3781879180.

The previous prime is 3781879163. The next prime is 3781879229. The reversal of 3781879181 is 1819781873.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3193380100 + 588499081 = 56510^2 + 24259^2 .

It is a cyclic number.

It is not a de Polignac number, because 3781879181 - 2⁶ = 3781879117 is a prime.

It is a super-2 number, since 2×3781879181² = 28605220279362461522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3781879781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1890939590 + 1890939591.

It is an arithmetic number, because the mean of its divisors is an integer number (1890939591).

Almost surely, 2^3781879181 is an apocalyptic number.

It is an amenable number.

3781879181 is a deficient number, since it is larger than the sum of its proper divisors (1).

3781879181 is an equidigital number, since it uses as much as digits as its factorization.

3781879181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 53.

The square root of 3781879181 is about 61496.9851374846. The cubic root of 3781879181 is about 1558.0063263157.

The spelling of 3781879181 in words is "three billion, seven hundred eighty-one million, eight hundred seventy-nine thousand, one hundred eighty-one".