91144193444123 has 2 divisors, whose sum is σ = 91144193444124. Its totient is φ = 91144193444122.

The previous prime is 91144193444069. The next prime is 91144193444149. The reversal of 91144193444123 is 32144439144119.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91144193444123 - 2²² = 91144189249819 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (91144193444023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45572096722061 + 45572096722062.

It is an arithmetic number, because the mean of its divisors is an integer number (45572096722062).

Almost surely, 2^{91144193444123} is an apocalyptic number.

91144193444123 is a deficient number, since it is larger than the sum of its proper divisors (1).

91144193444123 is an equidigital number, since it uses as much as digits as its factorization.

91144193444123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1492992, while the sum is 50.

The spelling of 91144193444123 in words is "ninety-one trillion, one hundred forty-four billion, one hundred ninety-three million, four hundred forty-four thousand, one hundred twenty-three".