91789151 has 2 divisors, whose sum is σ = 91789152. Its totient is φ = 91789150.

The previous prime is 91789141. The next prime is 91789153. The reversal of 91789151 is 15198719.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91789151 - 2¹⁰ = 91788127 is a prime.

Together with 91789153, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 91789099 and 91789108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91789153) 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 as a sum of consecutive naturals, namely, 45894575 + 45894576.

It is an arithmetic number, because the mean of its divisors is an integer number (45894576).

Almost surely, 2^91789151 is an apocalyptic number.

91789151 is a deficient number, since it is larger than the sum of its proper divisors (1).

91789151 is an equidigital number, since it uses as much as digits as its factorization.

91789151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 41.

The square root of 91789151 is about 9580.6654779300. The cubic root of 91789151 is about 451.0906073742.

The spelling of 91789151 in words is "ninety-one million, seven hundred eighty-nine thousand, one hundred fifty-one".