397810417 has 4 divisors (see below), whose sum is σ = 401749236. Its totient is φ = 393871600.

The previous prime is 397810409. The next prime is 397810459. The reversal of 397810417 is 714018793.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 173080336 + 224730081 = 13156^2 + 14991^2 .

It is a cyclic number.

It is not a de Polignac number, because 397810417 - 2³ = 397810409 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 397810417.

It is not an unprimeable number, because it can be changed into a prime (397810117) 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 in 3 ways as a sum of consecutive naturals, for example, 1969258 + ... + 1969459.

It is an arithmetic number, because the mean of its divisors is an integer number (100437309).

Almost surely, 2^397810417 is an apocalyptic number.

It is an amenable number.

397810417 is a deficient number, since it is larger than the sum of its proper divisors (3938819).

397810417 is a wasteful number, since it uses less digits than its factorization.

397810417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3938818.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 397810417 is about 19945.1853087406. The cubic root of 397810417 is about 735.4594236928.

The spelling of 397810417 in words is "three hundred ninety-seven million, eight hundred ten thousand, four hundred seventeen".