381869927 has 2 divisors, whose sum is σ = 381869928. Its totient is φ = 381869926.

The previous prime is 381869909. The next prime is 381870029. The reversal of 381869927 is 729968183.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 381869927 - 2¹² = 381865831 is a prime.

It is a super-2 number, since 2×381869927² = 291649282293970658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381863927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190934963 + 190934964.

It is an arithmetic number, because the mean of its divisors is an integer number (190934964).

Almost surely, 2^381869927 is an apocalyptic number.

381869927 is a deficient number, since it is larger than the sum of its proper divisors (1).

381869927 is an equidigital number, since it uses as much as digits as its factorization.

381869927 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 53.

The square root of 381869927 is about 19541.4924455631. The cubic root of 381869927 is about 725.5017862745.

The spelling of 381869927 in words is "three hundred eighty-one million, eight hundred sixty-nine thousand, nine hundred twenty-seven".