91323647 has 2 divisors, whose sum is σ = 91323648. Its totient is φ = 91323646.

The previous prime is 91323641. The next prime is 91323653. The reversal of 91323647 is 74632319.

It is a balanced prime because it is at equal distance from previous prime (91323641) and next prime (91323653).

It is a cyclic number.

It is not a de Polignac number, because 91323647 - 2⁸ = 91323391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91323641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45661823 + 45661824.

It is an arithmetic number, because the mean of its divisors is an integer number (45661824).

Almost surely, 2^91323647 is an apocalyptic number.

91323647 is a deficient number, since it is larger than the sum of its proper divisors (1).

91323647 is an equidigital number, since it uses as much as digits as its factorization.

91323647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 35.

The square root of 91323647 is about 9556.3406699427. The cubic root of 91323647 is about 450.3267536270.

The spelling of 91323647 in words is "ninety-one million, three hundred twenty-three thousand, six hundred forty-seven".