91747982 has 16 divisors (see below), whose sum is σ = 143486640. Its totient is φ = 43959552.

The previous prime is 91747949. The next prime is 91747987. The reversal of 91747982 is 28974719.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91747987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5507 + ... + 14622.

It is an arithmetic number, because the mean of its divisors is an integer number (8967915).

Almost surely, 2^91747982 is an apocalyptic number.

91747982 is a deficient number, since it is larger than the sum of its proper divisors (51738658).

91747982 is a wasteful number, since it uses less digits than its factorization.

91747982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20227.

The product of its digits is 254016, while the sum is 47.

The square root of 91747982 is about 9578.5166910122. The cubic root of 91747982 is about 451.0231566781.

It can be divided in two parts, 91747 and 982, that added together give a palindrome (92729).

The spelling of 91747982 in words is "ninety-one million, seven hundred forty-seven thousand, nine hundred eighty-two".