395299109 has 2 divisors, whose sum is σ = 395299110. Its totient is φ = 395299108.

The previous prime is 395299063. The next prime is 395299111. The reversal of 395299109 is 901992593.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 359860900 + 35438209 = 18970^2 + 5953^2 .

It is an emirp because it is prime and its reverse (901992593) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 395299109 - 2²⁰ = 394250533 is a prime.

It is a super-2 number, since 2×395299109² = 312522771152387762, which contains 22 as substring.

Together with 395299111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (395299159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197649554 + 197649555.

It is an arithmetic number, because the mean of its divisors is an integer number (197649555).

Almost surely, 2^395299109 is an apocalyptic number.

It is an amenable number.

395299109 is a deficient number, since it is larger than the sum of its proper divisors (1).

395299109 is an equidigital number, since it uses as much as digits as its factorization.

395299109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 196830, while the sum is 47.

The square root of 395299109 is about 19882.1303938989. The cubic root of 395299109 is about 733.9085464686.

The spelling of 395299109 in words is "three hundred ninety-five million, two hundred ninety-nine thousand, one hundred nine".