395690437 has 2 divisors, whose sum is σ = 395690438. Its totient is φ = 395690436.

The previous prime is 395690377. The next prime is 395690461. The reversal of 395690437 is 734096593.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 344510721 + 51179716 = 18561^2 + 7154^2 .

It is an emirp because it is prime and its reverse (734096593) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-395690437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (395690237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197845218 + 197845219.

It is an arithmetic number, because the mean of its divisors is an integer number (197845219).

Almost surely, 2^395690437 is an apocalyptic number.

It is an amenable number.

395690437 is a deficient number, since it is larger than the sum of its proper divisors (1).

395690437 is an equidigital number, since it uses as much as digits as its factorization.

395690437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 612360, while the sum is 46.

The square root of 395690437 is about 19891.9691584318. The cubic root of 395690437 is about 734.1506452052.

The spelling of 395690437 in words is "three hundred ninety-five million, six hundred ninety thousand, four hundred thirty-seven".