380918081 has 2 divisors, whose sum is σ = 380918082. Its totient is φ = 380918080.

The previous prime is 380918077. The next prime is 380918107. The reversal of 380918081 is 180819083.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 344436481 + 36481600 = 18559^2 + 6040^2 .

It is a cyclic number.

It is not a de Polignac number, because 380918081 - 2² = 380918077 is a prime.

It is a super-2 number, since 2×380918081² = 290197168865445122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (380918011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190459040 + 190459041.

It is an arithmetic number, because the mean of its divisors is an integer number (190459041).

Almost surely, 2^380918081 is an apocalyptic number.

It is an amenable number.

380918081 is a deficient number, since it is larger than the sum of its proper divisors (1).

380918081 is an equidigital number, since it uses as much as digits as its factorization.

380918081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 38.

The square root of 380918081 is about 19517.1227643831. The cubic root of 380918081 is about 724.8984913768.

The spelling of 380918081 in words is "three hundred eighty million, nine hundred eighteen thousand, eighty-one".