400317271 has 2 divisors, whose sum is σ = 400317272. Its totient is φ = 400317270.

The previous prime is 400317263. The next prime is 400317287. The reversal of 400317271 is 172713004.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400317271 - 2³ = 400317263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400317371) 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, 200158635 + 200158636.

It is an arithmetic number, because the mean of its divisors is an integer number (200158636).

Almost surely, 2^400317271 is an apocalyptic number.

400317271 is a deficient number, since it is larger than the sum of its proper divisors (1).

400317271 is an equidigital number, since it uses as much as digits as its factorization.

400317271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 400317271 is about 20007.9302027971. The cubic root of 400317271 is about 737.0010543051.

The spelling of 400317271 in words is "four hundred million, three hundred seventeen thousand, two hundred seventy-one".