91487119 has 2 divisors, whose sum is σ = 91487120. Its totient is φ = 91487118.

The previous prime is 91487087. The next prime is 91487171. The reversal of 91487119 is 91178419.

It is a weak prime.

It is an emirp because it is prime and its reverse (91178419) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91487119 - 2⁵ = 91487087 is a prime.

It is a super-2 number, since 2×91487119² = 16739785885840322, which contains 22 as substring.

It is equal to p_5298268 and since 91487119 and 5298268 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91487219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45743559 + 45743560.

It is an arithmetic number, because the mean of its divisors is an integer number (45743560).

Almost surely, 2^91487119 is an apocalyptic number.

91487119 is a deficient number, since it is larger than the sum of its proper divisors (1).

91487119 is an equidigital number, since it uses as much as digits as its factorization.

91487119 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 40.

The square root of 91487119 is about 9564.8899105008. The cubic root of 91487119 is about 450.5952928144.

The spelling of 91487119 in words is "ninety-one million, four hundred eighty-seven thousand, one hundred nineteen".