395691941 has 2 divisors, whose sum is σ = 395691942. Its totient is φ = 395691940.

The previous prime is 395691911. The next prime is 395691991. The reversal of 395691941 is 149196593.

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., 353064100 + 42627841 = 18790^2 + 6529^2 .

It is a cyclic number.

It is not a de Polignac number, because 395691941 - 2¹⁰ = 395690917 is a prime.

It is a super-2 number, since 2×395691941² = 313144224344694962, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (395691911) 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, 197845970 + 197845971.

It is an arithmetic number, because the mean of its divisors is an integer number (197845971).

Almost surely, 2^395691941 is an apocalyptic number.

It is an amenable number.

395691941 is a deficient number, since it is larger than the sum of its proper divisors (1).

395691941 is an equidigital number, since it uses as much as digits as its factorization.

395691941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 262440, while the sum is 47.

The square root of 395691941 is about 19892.0069625968. The cubic root of 395691941 is about 734.1515753609.

The spelling of 395691941 in words is "three hundred ninety-five million, six hundred ninety-one thousand, nine hundred forty-one".