400667317 has 2 divisors, whose sum is σ = 400667318. Its totient is φ = 400667316.

The previous prime is 400667279. The next prime is 400667321. The reversal of 400667317 is 713766004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212401476 + 188265841 = 14574^2 + 13721^2 .

It is a cyclic number.

It is not a de Polignac number, because 400667317 - 2¹¹ = 400665269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400667017) 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, 200333658 + 200333659.

It is an arithmetic number, because the mean of its divisors is an integer number (200333659).

Almost surely, 2^400667317 is an apocalyptic number.

It is an amenable number.

400667317 is a deficient number, since it is larger than the sum of its proper divisors (1).

400667317 is an equidigital number, since it uses as much as digits as its factorization.

400667317 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 34.

The square root of 400667317 is about 20016.6759727983. The cubic root of 400667317 is about 737.2158082270.

The spelling of 400667317 in words is "four hundred million, six hundred sixty-seven thousand, three hundred seventeen".