397201807 has 2 divisors, whose sum is σ = 397201808. Its totient is φ = 397201806.

The previous prime is 397201801. The next prime is 397201817. The reversal of 397201807 is 708102793.

It is a weak prime.

It is an emirp because it is prime and its reverse (708102793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 397201807 - 2¹⁵ = 397169039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397201801) 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, 198600903 + 198600904.

It is an arithmetic number, because the mean of its divisors is an integer number (198600904).

Almost surely, 2^397201807 is an apocalyptic number.

397201807 is a deficient number, since it is larger than the sum of its proper divisors (1).

397201807 is an equidigital number, since it uses as much as digits as its factorization.

397201807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 397201807 is about 19929.9224032609. The cubic root of 397201807 is about 735.0841725682.

The spelling of 397201807 in words is "three hundred ninety-seven million, two hundred one thousand, eight hundred seven".