91806850 has 24 divisors (see below), whose sum is σ = 172282500. Its totient is φ = 36395520.

The previous prime is 91806821. The next prime is 91806853. The reversal of 91806850 is 5860819.

It can be written as a sum of positive squares in 6 ways, for example, as 11758041 + 80048809 = 3429^2 + 8947^2 .

It is a super-3 number, since 3×91806850³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (91806853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2475 + ... + 13774.

Almost surely, 2^91806850 is an apocalyptic number.

91806850 is a deficient number, since it is larger than the sum of its proper divisors (80475650).

91806850 is a wasteful number, since it uses less digits than its factorization.

91806850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16374 (or 16369 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 91806850 is about 9581.5891166340. The cubic root of 91806850 is about 451.1195989615.

The spelling of 91806850 in words is "ninety-one million, eight hundred six thousand, eight hundred fifty".