381366971 has 2 divisors, whose sum is σ = 381366972. Its totient is φ = 381366970.

The previous prime is 381366943. The next prime is 381367003. The reversal of 381366971 is 179663183.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 381366971 - 2¹⁴ = 381350587 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (381366941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190683485 + 190683486.

It is an arithmetic number, because the mean of its divisors is an integer number (190683486).

Almost surely, 2^381366971 is an apocalyptic number.

381366971 is a deficient number, since it is larger than the sum of its proper divisors (1).

381366971 is an equidigital number, since it uses as much as digits as its factorization.

381366971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 44.

The square root of 381366971 is about 19528.6192804305. The cubic root of 381366971 is about 725.1831299575.

The spelling of 381366971 in words is "three hundred eighty-one million, three hundred sixty-six thousand, nine hundred seventy-one".