400340131322917 has 2 divisors, whose sum is σ = 400340131322918. Its totient is φ = 400340131322916.

The previous prime is 400340131322909. The next prime is 400340131322977. The reversal of 400340131322917 is 719223131043004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 235885180970916 + 164454950352001 = 15358554^2 + 12823999^2 .

It is a cyclic number.

It is not a de Polignac number, because 400340131322917 - 2³ = 400340131322909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400340131322917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400340131322977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200170065661458 + 200170065661459.

It is an arithmetic number, because the mean of its divisors is an integer number (200170065661459).

Almost surely, 2^{400340131322917} is an apocalyptic number.

It is an amenable number.

400340131322917 is a deficient number, since it is larger than the sum of its proper divisors (1).

400340131322917 is an equidigital number, since it uses as much as digits as its factorization.

400340131322917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 40.

The spelling of 400340131322917 in words is "four hundred trillion, three hundred forty billion, one hundred thirty-one million, three hundred twenty-two thousand, nine hundred seventeen".