395624646121 has 2 divisors, whose sum is σ = 395624646122. Its totient is φ = 395624646120.

The previous prime is 395624646113. The next prime is 395624646211. The reversal of 395624646121 is 121646426593.

Together with next prime (395624646211) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 305876469721 + 89748176400 = 553061^2 + 299580^2 .

It is a cyclic number.

It is not a de Polignac number, because 395624646121 - 2³ = 395624646113 is a prime.

It is not a weakly prime, because it can be changed into another prime (395624646821) 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, 197812323060 + 197812323061.

It is an arithmetic number, because the mean of its divisors is an integer number (197812323061).

Almost surely, 2^395624646121 is an apocalyptic number.

It is an amenable number.

395624646121 is a deficient number, since it is larger than the sum of its proper divisors (1).

395624646121 is an equidigital number, since it uses as much as digits as its factorization.

395624646121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 49.

The spelling of 395624646121 in words is "three hundred ninety-five billion, six hundred twenty-four million, six hundred forty-six thousand, one hundred twenty-one".