91971682 has 16 divisors (see below), whose sum is σ = 150696000. Its totient is φ = 41750640.

The previous prime is 91971661. The next prime is 91971689. The reversal of 91971682 is 28617919.

It is a super-3 number, since 3×91971682³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (91971689) 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 7 ways as a sum of consecutive naturals, for example, 17944 + ... + 22492.

It is an arithmetic number, because the mean of its divisors is an integer number (9418500).

Almost surely, 2^91971682 is an apocalyptic number.

91971682 is a deficient number, since it is larger than the sum of its proper divisors (58724318).

91971682 is a wasteful number, since it uses less digits than its factorization.

91971682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5481.

The product of its digits is 54432, while the sum is 43.

The square root of 91971682 is about 9590.1867552202. The cubic root of 91971682 is about 451.3894208328.

The spelling of 91971682 in words is "ninety-one million, nine hundred seventy-one thousand, six hundred eighty-two".