395989513 has 2 divisors, whose sum is σ = 395989514. Its totient is φ = 395989512.

The previous prime is 395989511. The next prime is 395989541. The reversal of 395989513 is 315989593.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 395731449 + 258064 = 19893^2 + 508^2 .

It is a cyclic number.

It is not a de Polignac number, because 395989513 - 2¹ = 395989511 is a prime.

Together with 395989511, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (395989511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197994756 + 197994757.

It is an arithmetic number, because the mean of its divisors is an integer number (197994757).

Almost surely, 2^395989513 is an apocalyptic number.

It is an amenable number.

395989513 is a deficient number, since it is larger than the sum of its proper divisors (1).

395989513 is an equidigital number, since it uses as much as digits as its factorization.

395989513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1312200, while the sum is 52.

The square root of 395989513 is about 19899.4852445987. The cubic root of 395989513 is about 734.3355637866.

The spelling of 395989513 in words is "three hundred ninety-five million, nine hundred eighty-nine thousand, five hundred thirteen".