91681796 has 6 divisors (see below), whose sum is σ = 160443150. Its totient is φ = 45840896.

The previous prime is 91681771. The next prime is 91681801. The reversal of 91681796 is 69718619.

It can be written as a sum of positive squares in only one way, i.e., 64224196 + 27457600 = 8014^2 + 5240^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 91681796.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 11460221 + ... + 11460228.

It is an arithmetic number, because the mean of its divisors is an integer number (26740525).

Almost surely, 2^91681796 is an apocalyptic number.

It is an amenable number.

91681796 is a deficient number, since it is larger than the sum of its proper divisors (68761354).

91681796 is a wasteful number, since it uses less digits than its factorization.

91681796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22920453 (or 22920451 counting only the distinct ones).

The product of its digits is 163296, while the sum is 47.

The square root of 91681796 is about 9575.0611486298. The cubic root of 91681796 is about 450.9146761825.

The spelling of 91681796 in words is "ninety-one million, six hundred eighty-one thousand, seven hundred ninety-six".