91338427 has 2 divisors, whose sum is σ = 91338428. Its totient is φ = 91338426.

The previous prime is 91338421. The next prime is 91338469. The reversal of 91338427 is 72483319.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91338427 - 2¹¹ = 91336379 is a prime.

It is not a weakly prime, because it can be changed into another prime (91338421) 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, 45669213 + 45669214.

It is an arithmetic number, because the mean of its divisors is an integer number (45669214).

Almost surely, 2^91338427 is an apocalyptic number.

91338427 is a deficient number, since it is larger than the sum of its proper divisors (1).

91338427 is an equidigital number, since it uses as much as digits as its factorization.

91338427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 37.

The square root of 91338427 is about 9557.1139472123. The cubic root of 91338427 is about 450.3510462413.

It can be divided in two parts, 913 and 38427, that added together give a triangular number (39340 = T₂₈₀).

The spelling of 91338427 in words is "ninety-one million, three hundred thirty-eight thousand, four hundred twenty-seven".