91130773 has 2 divisors, whose sum is σ = 91130774. Its totient is φ = 91130772.

The previous prime is 91130759. The next prime is 91130839. The reversal of 91130773 is 37703119.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77757124 + 13373649 = 8818^2 + 3657^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91130773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91130713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45565386 + 45565387.

It is an arithmetic number, because the mean of its divisors is an integer number (45565387).

Almost surely, 2^91130773 is an apocalyptic number.

It is an amenable number.

91130773 is a deficient number, since it is larger than the sum of its proper divisors (1).

91130773 is an equidigital number, since it uses as much as digits as its factorization.

91130773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3969, while the sum is 31.

The square root of 91130773 is about 9546.2439210404. The cubic root of 91130773 is about 450.0095026800.

It can be divided in two parts, 911 and 30773, that added together give a square (31684 = 178²).

The spelling of 91130773 in words is "ninety-one million, one hundred thirty thousand, seven hundred seventy-three".