91178917103 has 2 divisors, whose sum is σ = 91178917104. Its totient is φ = 91178917102.

The previous prime is 91178917051. The next prime is 91178917153. The reversal of 91178917103 is 30171987119.

It is a strong prime.

It is an emirp because it is prime and its reverse (30171987119) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91178917103 - 2¹⁰ = 91178916079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91178917153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45589458551 + 45589458552.

It is an arithmetic number, because the mean of its divisors is an integer number (45589458552).

Almost surely, 2^91178917103 is an apocalyptic number.

91178917103 is a deficient number, since it is larger than the sum of its proper divisors (1).

91178917103 is an equidigital number, since it uses as much as digits as its factorization.

91178917103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 47.

The spelling of 91178917103 in words is "ninety-one billion, one hundred seventy-eight million, nine hundred seventeen thousand, one hundred three".