397795109 has 2 divisors, whose sum is σ = 397795110. Its totient is φ = 397795108.

The previous prime is 397795093. The next prime is 397795129. The reversal of 397795109 is 901597793.

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., 358042084 + 39753025 = 18922^2 + 6305^2 .

It is a cyclic number.

It is not a de Polignac number, because 397795109 - 2⁴ = 397795093 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397795129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198897554 + 198897555.

It is an arithmetic number, because the mean of its divisors is an integer number (198897555).

Almost surely, 2^397795109 is an apocalyptic number.

It is an amenable number.

397795109 is a deficient number, since it is larger than the sum of its proper divisors (1).

397795109 is an equidigital number, since it uses as much as digits as its factorization.

397795109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 535815, while the sum is 50.

The square root of 397795109 is about 19944.8015532870. The cubic root of 397795109 is about 735.4499899217.

The spelling of 397795109 in words is "three hundred ninety-seven million, seven hundred ninety-five thousand, one hundred nine".