91106773 has 2 divisors, whose sum is σ = 91106774. Its totient is φ = 91106772.

The previous prime is 91106761. The next prime is 91106783. The reversal of 91106773 is 37760119.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87198244 + 3908529 = 9338^2 + 1977^2 .

It is a cyclic number.

It is not a de Polignac number, because 91106773 - 2⁹ = 91106261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91106713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45553386 + 45553387.

It is an arithmetic number, because the mean of its divisors is an integer number (45553387).

Almost surely, 2^91106773 is an apocalyptic number.

It is an amenable number.

91106773 is a deficient number, since it is larger than the sum of its proper divisors (1).

91106773 is an equidigital number, since it uses as much as digits as its factorization.

91106773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7938, while the sum is 34.

The square root of 91106773 is about 9544.9867993623. The cubic root of 91106773 is about 449.9699947072.

The spelling of 91106773 in words is "ninety-one million, one hundred six thousand, seven hundred seventy-three".