91198063 has 24 divisors (see below), whose sum is σ = 106178688. Its totient is φ = 78144000.

The previous prime is 91198021. The next prime is 91198067. The reversal of 91198063 is 36089119.

It is not a de Polignac number, because 91198063 - 2⁹ = 91197551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91198067) 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 23 ways as a sum of consecutive naturals, for example, 153495 + ... + 154087.

It is an arithmetic number, because the mean of its divisors is an integer number (4424112).

Almost surely, 2^91198063 is an apocalyptic number.

91198063 is a deficient number, since it is larger than the sum of its proper divisors (14980625).

91198063 is a wasteful number, since it uses less digits than its factorization.

91198063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687 (or 676 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 91198063 is about 9549.7676935096. The cubic root of 91198063 is about 450.1202361838.

The spelling of 91198063 in words is "ninety-one million, one hundred ninety-eight thousand, sixty-three".