382156681 has 2 divisors, whose sum is σ = 382156682. Its totient is φ = 382156680.

The previous prime is 382156673. The next prime is 382156699. The reversal of 382156681 is 186651283.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 376981056 + 5175625 = 19416^2 + 2275^2 .

It is a cyclic number.

It is not a de Polignac number, because 382156681 - 2³ = 382156673 is a prime.

It is a super-2 number, since 2×382156681² = 292087457665871522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (382156631) 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, 191078340 + 191078341.

It is an arithmetic number, because the mean of its divisors is an integer number (191078341).

Almost surely, 2^382156681 is an apocalyptic number.

It is an amenable number.

382156681 is a deficient number, since it is larger than the sum of its proper divisors (1).

382156681 is an equidigital number, since it uses as much as digits as its factorization.

382156681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 40.

The square root of 382156681 is about 19548.8281234451. The cubic root of 382156681 is about 725.6833389204.

The spelling of 382156681 in words is "three hundred eighty-two million, one hundred fifty-six thousand, six hundred eighty-one".