91750927 has 2 divisors, whose sum is σ = 91750928. Its totient is φ = 91750926.

The previous prime is 91750889. The next prime is 91750931. The reversal of 91750927 is 72905719.

It is a strong prime.

It is an emirp because it is prime and its reverse (72905719) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91750927 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91750927.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91750937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45875463 + 45875464.

It is an arithmetic number, because the mean of its divisors is an integer number (45875464).

Almost surely, 2^91750927 is an apocalyptic number.

91750927 is a deficient number, since it is larger than the sum of its proper divisors (1).

91750927 is an equidigital number, since it uses as much as digits as its factorization.

91750927 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39690, while the sum is 40.

The square root of 91750927 is about 9578.6704192179. The cubic root of 91750927 is about 451.0279823937.

The spelling of 91750927 in words is "ninety-one million, seven hundred fifty thousand, nine hundred twenty-seven".