91849129 has 2 divisors, whose sum is σ = 91849130. Its totient is φ = 91849128.

The previous prime is 91849127. The next prime is 91849141. The reversal of 91849129 is 92194819.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69305625 + 22543504 = 8325^2 + 4748^2 .

It is a cyclic number.

It is not a de Polignac number, because 91849129 - 2¹ = 91849127 is a prime.

Together with 91849127, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (91849127) 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, 45924564 + 45924565.

It is an arithmetic number, because the mean of its divisors is an integer number (45924565).

Almost surely, 2^91849129 is an apocalyptic number.

It is an amenable number.

91849129 is a deficient number, since it is larger than the sum of its proper divisors (1).

91849129 is an equidigital number, since it uses as much as digits as its factorization.

91849129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 43.

The square root of 91849129 is about 9583.7951251057. The cubic root of 91849129 is about 451.1888383790.

The spelling of 91849129 in words is "ninety-one million, eight hundred forty-nine thousand, one hundred twenty-nine".