91028383 has 2 divisors, whose sum is σ = 91028384. Its totient is φ = 91028382.

The previous prime is 91028347. The next prime is 91028423. The reversal of 91028383 is 38382019.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91028383 - 2¹³ = 91020191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91028783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45514191 + 45514192.

It is an arithmetic number, because the mean of its divisors is an integer number (45514192).

Almost surely, 2^91028383 is an apocalyptic number.

91028383 is a deficient number, since it is larger than the sum of its proper divisors (1).

91028383 is an equidigital number, since it uses as much as digits as its factorization.

91028383 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 91028383 is about 9540.8795716118. The cubic root of 91028383 is about 449.8409034291.

The spelling of 91028383 in words is "ninety-one million, twenty-eight thousand, three hundred eighty-three".