91828641 has 4 divisors (see below), whose sum is σ = 122438192. Its totient is φ = 61219092.

The previous prime is 91828619. The next prime is 91828651. The reversal of 91828641 is 14682819.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 91828641 - 2²¹ = 89731489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 91828641.

It is not an unprimeable number, because it can be changed into a prime (91828651) 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 3 ways as a sum of consecutive naturals, for example, 15304771 + ... + 15304776.

It is an arithmetic number, because the mean of its divisors is an integer number (30609548).

Almost surely, 2^91828641 is an apocalyptic number.

It is an amenable number.

91828641 is a deficient number, since it is larger than the sum of its proper divisors (30609551).

91828641 is a wasteful number, since it uses less digits than its factorization.

91828641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30609550.

The product of its digits is 27648, while the sum is 39.

The square root of 91828641 is about 9582.7261778682. The cubic root of 91828641 is about 451.1552882719.

The spelling of 91828641 in words is "ninety-one million, eight hundred twenty-eight thousand, six hundred forty-one".