91832321 has 12 divisors (see below), whose sum is σ = 108292932. Its totient is φ = 77632128.

The previous prime is 91832297. The next prime is 91832329. The reversal of 91832321 is 12323819.

It can be written as a sum of positive squares in 2 ways, for example, as 65934400 + 25897921 = 8120^2 + 5089^2 .

It is not a de Polignac number, because 91832321 - 2¹⁴ = 91815937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91832329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9260 + ... + 16413.

It is an arithmetic number, because the mean of its divisors is an integer number (9024411).

It is a Proth number, since it is equal to 5605 ⋅ 2¹⁴ + 1 and 5605 < 2¹⁴.

Almost surely, 2^91832321 is an apocalyptic number.

It is an amenable number.

91832321 is a deficient number, since it is larger than the sum of its proper divisors (16460611).

91832321 is a wasteful number, since it uses less digits than its factorization.

91832321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25760 (or 25753 counting only the distinct ones).

The product of its digits is 2592, while the sum is 29.

The square root of 91832321 is about 9582.9181881095. The cubic root of 91832321 is about 451.1613148205.

The spelling of 91832321 in words is "ninety-one million, eight hundred thirty-two thousand, three hundred twenty-one".