381215347 has 2 divisors, whose sum is σ = 381215348. Its totient is φ = 381215346.

The previous prime is 381215333. The next prime is 381215357. The reversal of 381215347 is 743512183.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381215347 is a prime.

It is not a weakly prime, because it can be changed into another prime (381215357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190607673 + 190607674.

It is an arithmetic number, because the mean of its divisors is an integer number (190607674).

Almost surely, 2^381215347 is an apocalyptic number.

381215347 is a deficient number, since it is larger than the sum of its proper divisors (1).

381215347 is an equidigital number, since it uses as much as digits as its factorization.

381215347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 34.

The square root of 381215347 is about 19524.7367972016. The cubic root of 381215347 is about 725.0870110393.

The spelling of 381215347 in words is "three hundred eighty-one million, two hundred fifteen thousand, three hundred forty-seven".