91132783 has 4 divisors (see below), whose sum is σ = 104151760. Its totient is φ = 78113808.

The previous prime is 91132763. The next prime is 91132807. The reversal of 91132783 is 38723119.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38723119 = 67 ⋅577957.

It is a cyclic number.

It is not a de Polignac number, because 91132783 - 2⁹ = 91132271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91132763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6509478 + ... + 6509491.

It is an arithmetic number, because the mean of its divisors is an integer number (26037940).

Almost surely, 2^91132783 is an apocalyptic number.

91132783 is a deficient number, since it is larger than the sum of its proper divisors (13018977).

91132783 is a wasteful number, since it uses less digits than its factorization.

91132783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13018976.

The product of its digits is 9072, while the sum is 34.

The square root of 91132783 is about 9546.3491974681. The cubic root of 91132783 is about 450.0128111579.

The spelling of 91132783 in words is "ninety-one million, one hundred thirty-two thousand, seven hundred eighty-three".