91791151 has 2 divisors, whose sum is σ = 91791152. Its totient is φ = 91791150.

The previous prime is 91791131. The next prime is 91791173. The reversal of 91791151 is 15119719.

It is a weak prime.

It is an emirp because it is prime and its reverse (15119719) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91791151 - 2¹³ = 91782959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91791101) 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, 45895575 + 45895576.

It is an arithmetic number, because the mean of its divisors is an integer number (45895576).

Almost surely, 2^91791151 is an apocalyptic number.

91791151 is a deficient number, since it is larger than the sum of its proper divisors (1).

91791151 is an equidigital number, since it uses as much as digits as its factorization.

91791151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2835, while the sum is 34.

The square root of 91791151 is about 9580.7698542445. The cubic root of 91791151 is about 451.0938836316.

The spelling of 91791151 in words is "ninety-one million, seven hundred ninety-one thousand, one hundred fifty-one".