395971547 has 2 divisors, whose sum is σ = 395971548. Its totient is φ = 395971546.

The previous prime is 395971517. The next prime is 395971553. The reversal of 395971547 is 745179593.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-395971547 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 395971495 and 395971504.

It is not a weakly prime, because it can be changed into another prime (395971517) 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, 197985773 + 197985774.

It is an arithmetic number, because the mean of its divisors is an integer number (197985774).

Almost surely, 2^395971547 is an apocalyptic number.

395971547 is a deficient number, since it is larger than the sum of its proper divisors (1).

395971547 is an equidigital number, since it uses as much as digits as its factorization.

395971547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1190700, while the sum is 50.

The square root of 395971547 is about 19899.0338207663. The cubic root of 395971547 is about 734.3244580445.

The spelling of 395971547 in words is "three hundred ninety-five million, nine hundred seventy-one thousand, five hundred forty-seven".