381765101 has 2 divisors, whose sum is σ = 381765102. Its totient is φ = 381765100.

The previous prime is 381765091. The next prime is 381765113. The reversal of 381765101 is 101567183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 296184100 + 85581001 = 17210^2 + 9251^2 .

It is a cyclic number.

It is not a de Polignac number, because 381765101 - 2¹⁰ = 381764077 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381765151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190882550 + 190882551.

It is an arithmetic number, because the mean of its divisors is an integer number (190882551).

Almost surely, 2^381765101 is an apocalyptic number.

It is an amenable number.

381765101 is a deficient number, since it is larger than the sum of its proper divisors (1).

381765101 is an equidigital number, since it uses as much as digits as its factorization.

381765101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 381765101 is about 19538.8101224205. The cubic root of 381765101 is about 725.4353950726.

The spelling of 381765101 in words is "three hundred eighty-one million, seven hundred sixty-five thousand, one hundred one".