397280417 has 2 divisors, whose sum is σ = 397280418. Its totient is φ = 397280416.

The previous prime is 397280393. The next prime is 397280431. The reversal of 397280417 is 714082793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 237283216 + 159997201 = 15404^2 + 12649^2 .

It is a cyclic number.

It is not a de Polignac number, because 397280417 - 2⁶ = 397280353 is a prime.

It is a Chen prime.

It is equal to p_21198848 and since 397280417 and 21198848 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (397280467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198640208 + 198640209.

It is an arithmetic number, because the mean of its divisors is an integer number (198640209).

Almost surely, 2^397280417 is an apocalyptic number.

It is an amenable number.

397280417 is a deficient number, since it is larger than the sum of its proper divisors (1).

397280417 is an equidigital number, since it uses as much as digits as its factorization.

397280417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 397280417 is about 19931.8944659056. The cubic root of 397280417 is about 735.1326627430.

The spelling of 397280417 in words is "three hundred ninety-seven million, two hundred eighty thousand, four hundred seventeen".