381547147 has 2 divisors, whose sum is σ = 381547148. Its totient is φ = 381547146.

The previous prime is 381547141. The next prime is 381547157. The reversal of 381547147 is 741745183.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (741745183) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381547147 is a prime.

It is not a weakly prime, because it can be changed into another prime (381547141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190773573 + 190773574.

It is an arithmetic number, because the mean of its divisors is an integer number (190773574).

Almost surely, 2^381547147 is an apocalyptic number.

381547147 is a deficient number, since it is larger than the sum of its proper divisors (1).

381547147 is an equidigital number, since it uses as much as digits as its factorization.

381547147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94080, while the sum is 40.

The square root of 381547147 is about 19533.2318626488. The cubic root of 381547147 is about 725.2973157105.

The spelling of 381547147 in words is "three hundred eighty-one million, five hundred forty-seven thousand, one hundred forty-seven".