395421563 has 2 divisors, whose sum is σ = 395421564. Its totient is φ = 395421562.

The previous prime is 395421529. The next prime is 395421577. The reversal of 395421563 is 365124593.

It is a strong prime.

It is an emirp because it is prime and its reverse (365124593) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-395421563 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (395421503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197710781 + 197710782.

It is an arithmetic number, because the mean of its divisors is an integer number (197710782).

Almost surely, 2^395421563 is an apocalyptic number.

395421563 is a deficient number, since it is larger than the sum of its proper divisors (1).

395421563 is an equidigital number, since it uses as much as digits as its factorization.

395421563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 38.

The square root of 395421563 is about 19885.2096544140. The cubic root of 395421563 is about 733.9843209534.

The spelling of 395421563 in words is "three hundred ninety-five million, four hundred twenty-one thousand, five hundred sixty-three".