91673447 has 2 divisors, whose sum is σ = 91673448. Its totient is φ = 91673446.

The previous prime is 91673441. The next prime is 91673467. The reversal of 91673447 is 74437619.

It is a weak prime.

It is an emirp because it is prime and its reverse (74437619) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91673447 - 2⁴ = 91673431 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91673441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45836723 + 45836724.

It is an arithmetic number, because the mean of its divisors is an integer number (45836724).

Almost surely, 2^91673447 is an apocalyptic number.

91673447 is a deficient number, since it is larger than the sum of its proper divisors (1).

91673447 is an equidigital number, since it uses as much as digits as its factorization.

91673447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 41.

The square root of 91673447 is about 9574.6251623758. The cubic root of 91673447 is about 450.9009882565.

The spelling of 91673447 in words is "ninety-one million, six hundred seventy-three thousand, four hundred forty-seven".