867661884013 has 2 divisors, whose sum is σ = 867661884014. Its totient is φ = 867661884012.

The previous prime is 867661883989. The next prime is 867661884101. The reversal of 867661884013 is 310488166768.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 700497019849 + 167164864164 = 836957^2 + 408858^2 .

It is a cyclic number.

It is not a de Polignac number, because 867661884013 - 2¹⁷ = 867661752941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (867661884913) 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, 433830942006 + 433830942007.

It is an arithmetic number, because the mean of its divisors is an integer number (433830942007).

Almost surely, 2^867661884013 is an apocalyptic number.

It is an amenable number.

867661884013 is a deficient number, since it is larger than the sum of its proper divisors (1).

867661884013 is an equidigital number, since it uses as much as digits as its factorization.

867661884013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9289728, while the sum is 58.

The spelling of 867661884013 in words is "eight hundred sixty-seven billion, six hundred sixty-one million, eight hundred eighty-four thousand, thirteen".