397008197 has 2 divisors, whose sum is σ = 397008198. Its totient is φ = 397008196.

The previous prime is 397008181. The next prime is 397008229. The reversal of 397008197 is 791800793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219958561 + 177049636 = 14831^2 + 13306^2 .

It is a cyclic number.

It is not a de Polignac number, because 397008197 - 2⁴ = 397008181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397008137) 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, 198504098 + 198504099.

It is an arithmetic number, because the mean of its divisors is an integer number (198504099).

Almost surely, 2^397008197 is an apocalyptic number.

It is an amenable number.

397008197 is a deficient number, since it is larger than the sum of its proper divisors (1).

397008197 is an equidigital number, since it uses as much as digits as its factorization.

397008197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 397008197 is about 19925.0645419281. The cubic root of 397008197 is about 734.9647179448.

The spelling of 397008197 in words is "three hundred ninety-seven million, eight thousand, one hundred ninety-seven".