91146108773 has 2 divisors, whose sum is σ = 91146108774. Its totient is φ = 91146108772.

The previous prime is 91146108751. The next prime is 91146108869. The reversal of 91146108773 is 37780164119.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64362167809 + 26783940964 = 253697^2 + 163658^2 .

It is a cyclic number.

It is not a de Polignac number, because 91146108773 - 2¹² = 91146104677 is a prime.

It is a super-2 number, since 2×91146108773² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91146108733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45573054386 + 45573054387.

It is an arithmetic number, because the mean of its divisors is an integer number (45573054387).

Almost surely, 2^91146108773 is an apocalyptic number.

It is an amenable number.

91146108773 is a deficient number, since it is larger than the sum of its proper divisors (1).

91146108773 is an equidigital number, since it uses as much as digits as its factorization.

91146108773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 47.

The spelling of 91146108773 in words is "ninety-one billion, one hundred forty-six million, one hundred eight thousand, seven hundred seventy-three".