91217146 has 8 divisors (see below), whose sum is σ = 136926144. Its totient is φ = 45575100.

The previous prime is 91217141. The next prime is 91217167. The reversal of 91217146 is 64171219.

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

It is not an unprimeable number, because it can be changed into a prime (91217141) 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 3 ways as a sum of consecutive naturals, for example, 13180 + ... + 18871.

It is an arithmetic number, because the mean of its divisors is an integer number (17115768).

Almost surely, 2^91217146 is an apocalyptic number.

91217146 is a deficient number, since it is larger than the sum of its proper divisors (45708998).

91217146 is a wasteful number, since it uses less digits than its factorization.

91217146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33476.

The product of its digits is 3024, while the sum is 31.

The square root of 91217146 is about 9550.7667755003. The cubic root of 91217146 is about 450.1516295604.

The spelling of 91217146 in words is "ninety-one million, two hundred seventeen thousand, one hundred forty-six".