380365681 has 2 divisors, whose sum is σ = 380365682. Its totient is φ = 380365680.

The previous prime is 380365679. The next prime is 380365703. The reversal of 380365681 is 186563083.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 344473600 + 35892081 = 18560^2 + 5991^2 .

It is a cyclic number.

It is not a de Polignac number, because 380365681 - 2¹ = 380365679 is a prime.

It is a super-2 number, since 2×380365681² = 289356102565187522, which contains 22 as substring.

Together with 380365679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (380365621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190182840 + 190182841.

It is an arithmetic number, because the mean of its divisors is an integer number (190182841).

Almost surely, 2^380365681 is an apocalyptic number.

It is an amenable number.

380365681 is a deficient number, since it is larger than the sum of its proper divisors (1).

380365681 is an equidigital number, since it uses as much as digits as its factorization.

380365681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 380365681 is about 19502.9659539261. The cubic root of 380365681 is about 724.5479106178.

The spelling of 380365681 in words is "three hundred eighty million, three hundred sixty-five thousand, six hundred eighty-one".