91487419 has 2 divisors, whose sum is σ = 91487420. Its totient is φ = 91487418.

The previous prime is 91487401. The next prime is 91487449. The reversal of 91487419 is 91478419.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91487419 - 2¹⁵ = 91454651 is a prime.

It is a super-2 number, since 2×91487419² = 16739895670563122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (91487449) 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, 45743709 + 45743710.

It is an arithmetic number, because the mean of its divisors is an integer number (45743710).

Almost surely, 2^91487419 is an apocalyptic number.

91487419 is a deficient number, since it is larger than the sum of its proper divisors (1).

91487419 is an equidigital number, since it uses as much as digits as its factorization.

91487419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 43.

The square root of 91487419 is about 9564.9055928430. The cubic root of 91487419 is about 450.5957853371.

The spelling of 91487419 in words is "ninety-one million, four hundred eighty-seven thousand, four hundred nineteen".