91148329 has 2 divisors, whose sum is σ = 91148330. Its totient is φ = 91148328.

The previous prime is 91148327. The next prime is 91148389. The reversal of 91148329 is 92384119.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66912400 + 24235929 = 8180^2 + 4923^2 .

It is an emirp because it is prime and its reverse (92384119) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91148329 - 2¹ = 91148327 is a prime.

Together with 91148327, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (91148327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45574164 + 45574165.

It is an arithmetic number, because the mean of its divisors is an integer number (45574165).

Almost surely, 2^91148329 is an apocalyptic number.

It is an amenable number.

91148329 is a deficient number, since it is larger than the sum of its proper divisors (1).

91148329 is an equidigital number, since it uses as much as digits as its factorization.

91148329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 37.

The square root of 91148329 is about 9547.1634007175. The cubic root of 91148329 is about 450.0383983695.

The spelling of 91148329 in words is "ninety-one million, one hundred forty-eight thousand, three hundred twenty-nine".