400247534417 has 2 divisors, whose sum is σ = 400247534418. Its totient is φ = 400247534416.

The previous prime is 400247534413. The next prime is 400247534527. The reversal of 400247534417 is 714435742004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 398980459201 + 1267075216 = 631649^2 + 35596^2 .

It is a cyclic number.

It is not a de Polignac number, because 400247534417 - 2² = 400247534413 is a prime.

It is not a weakly prime, because it can be changed into another prime (400247534413) 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, 200123767208 + 200123767209.

It is an arithmetic number, because the mean of its divisors is an integer number (200123767209).

Almost surely, 2^400247534417 is an apocalyptic number.

It is an amenable number.

400247534417 is a deficient number, since it is larger than the sum of its proper divisors (1).

400247534417 is an equidigital number, since it uses as much as digits as its factorization.

400247534417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 376320, while the sum is 41.

The spelling of 400247534417 in words is "four hundred billion, two hundred forty-seven million, five hundred thirty-four thousand, four hundred seventeen".