395970149 has 2 divisors, whose sum is σ = 395970150. Its totient is φ = 395970148.

The previous prime is 395970131. The next prime is 395970217. The reversal of 395970149 is 941079593.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 391050625 + 4919524 = 19775^2 + 2218^2 .

It is an emirp because it is prime and its reverse (941079593) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 395970149 - 2²⁰ = 394921573 is a prime.

It is a Sophie Germain prime.

It is a Chen 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 (395970109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197985074 + 197985075.

It is an arithmetic number, because the mean of its divisors is an integer number (197985075).

Almost surely, 2^395970149 is an apocalyptic number.

It is an amenable number.

395970149 is a deficient number, since it is larger than the sum of its proper divisors (1).

395970149 is an equidigital number, since it uses as much as digits as its factorization.

395970149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 306180, while the sum is 47.

The square root of 395970149 is about 19898.9986934016. The cubic root of 395970149 is about 734.3235938521.

The spelling of 395970149 in words is "three hundred ninety-five million, nine hundred seventy thousand, one hundred forty-nine".