91217463 has 8 divisors (see below), whose sum is σ = 123336576. Its totient is φ = 59955000.

The previous prime is 91217449. The next prime is 91217473. The reversal of 91217463 is 36471219.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91217463 - 2²⁰ = 90168887 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91217473) 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 in 7 ways as a sum of consecutive naturals, for example, 213913 + ... + 214338.

It is an arithmetic number, because the mean of its divisors is an integer number (15417072).

Almost surely, 2^91217463 is an apocalyptic number.

91217463 is a deficient number, since it is larger than the sum of its proper divisors (32119113).

91217463 is a wasteful number, since it uses less digits than its factorization.

91217463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428325.

The product of its digits is 9072, while the sum is 33.

The square root of 91217463 is about 9550.7833710120. The cubic root of 91217463 is about 450.1521510190.

The spelling of 91217463 in words is "ninety-one million, two hundred seventeen thousand, four hundred sixty-three".