91891367 has 2 divisors, whose sum is σ = 91891368. Its totient is φ = 91891366.

The previous prime is 91891361. The next prime is 91891399. The reversal of 91891367 is 76319819.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91891367 - 2¹⁴ = 91874983 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91891361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45945683 + 45945684.

It is an arithmetic number, because the mean of its divisors is an integer number (45945684).

Almost surely, 2^91891367 is an apocalyptic number.

91891367 is a deficient number, since it is larger than the sum of its proper divisors (1).

91891367 is an equidigital number, since it uses as much as digits as its factorization.

91891367 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 44.

The square root of 91891367 is about 9585.9984873773. The cubic root of 91891367 is about 451.2579894381.

The spelling of 91891367 in words is "ninety-one million, eight hundred ninety-one thousand, three hundred sixty-seven".