395231647 has 2 divisors, whose sum is σ = 395231648. Its totient is φ = 395231646.

The previous prime is 395231621. The next prime is 395231651. The reversal of 395231647 is 746132593.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 395231647 - 2⁷ = 395231519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (395231687) 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, 197615823 + 197615824.

It is an arithmetic number, because the mean of its divisors is an integer number (197615824).

Almost surely, 2^395231647 is an apocalyptic number.

395231647 is a deficient number, since it is larger than the sum of its proper divisors (1).

395231647 is an equidigital number, since it uses as much as digits as its factorization.

395231647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 40.

The square root of 395231647 is about 19880.4337729336. The cubic root of 395231647 is about 733.8667943253.

The spelling of 395231647 in words is "three hundred ninety-five million, two hundred thirty-one thousand, six hundred forty-seven".