91489829 has 2 divisors, whose sum is σ = 91489830. Its totient is φ = 91489828.

The previous prime is 91489823. The next prime is 91489831. The reversal of 91489829 is 92898419.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73017025 + 18472804 = 8545^2 + 4298^2 .

It is an emirp because it is prime and its reverse (92898419) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91489829 is a prime.

Together with 91489831, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91489823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45744914 + 45744915.

It is an arithmetic number, because the mean of its divisors is an integer number (45744915).

Almost surely, 2^91489829 is an apocalyptic number.

It is an amenable number.

91489829 is a deficient number, since it is larger than the sum of its proper divisors (1).

91489829 is an equidigital number, since it uses as much as digits as its factorization.

91489829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 50.

The square root of 91489829 is about 9565.0315733927. The cubic root of 91489829 is about 450.5997418968.

The spelling of 91489829 in words is "ninety-one million, four hundred eighty-nine thousand, eight hundred twenty-nine".