91663486 has 8 divisors (see below), whose sum is σ = 144731880. Its totient is φ = 43419528.

The previous prime is 91663483. The next prime is 91663513. The reversal of 91663486 is 68436619.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91663483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1206061 + ... + 1206136.

It is an arithmetic number, because the mean of its divisors is an integer number (18091485).

Almost surely, 2^91663486 is an apocalyptic number.

91663486 is a deficient number, since it is larger than the sum of its proper divisors (53068394).

91663486 is a wasteful number, since it uses less digits than its factorization.

91663486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2412218.

The product of its digits is 186624, while the sum is 43.

The square root of 91663486 is about 9574.1049712232. The cubic root of 91663486 is about 450.8846564193.

The spelling of 91663486 in words is "ninety-one million, six hundred sixty-three thousand, four hundred eighty-six".