193217107891043 has 2 divisors, whose sum is σ = 193217107891044. Its totient is φ = 193217107891042.

The previous prime is 193217107890899. The next prime is 193217107891097. The reversal of 193217107891043 is 340198701712391.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 193217107891043 - 2⁸ = 193217107890787 is a prime.

It is a super-5 number, since 5×193217107891043⁵ (a number of 73 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 193217107891043.

It is not a weakly prime, because it can be changed into another prime (193217107894043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96608553945521 + 96608553945522.

It is an arithmetic number, because the mean of its divisors is an integer number (96608553945522).

Almost surely, 2^{193217107891043} is an apocalyptic number.

193217107891043 is a deficient number, since it is larger than the sum of its proper divisors (1).

193217107891043 is an equidigital number, since it uses as much as digits as its factorization.

193217107891043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2286144, while the sum is 56.

The spelling of 193217107891043 in words is "one hundred ninety-three trillion, two hundred seventeen billion, one hundred seven million, eight hundred ninety-one thousand, forty-three".