395919389 has 2 divisors, whose sum is σ = 395919390. Its totient is φ = 395919388.

The previous prime is 395919353. The next prime is 395919413. The reversal of 395919389 is 983919593.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209815225 + 186104164 = 14485^2 + 13642^2 .

It is a cyclic number.

It is not a de Polignac number, because 395919389 - 2⁸ = 395919133 is a prime.

It is a super-2 number, since 2×395919389² = 313504325172266642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (395919319) 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, 197959694 + 197959695.

It is an arithmetic number, because the mean of its divisors is an integer number (197959695).

Almost surely, 2^395919389 is an apocalyptic number.

It is an amenable number.

395919389 is a deficient number, since it is larger than the sum of its proper divisors (1).

395919389 is an equidigital number, since it uses as much as digits as its factorization.

395919389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2361960, while the sum is 56.

The square root of 395919389 is about 19897.7232114632. The cubic root of 395919389 is about 734.2922145014.

The spelling of 395919389 in words is "three hundred ninety-five million, nine hundred nineteen thousand, three hundred eighty-nine".