91853473 has 2 divisors, whose sum is σ = 91853474. Its totient is φ = 91853472.

The previous prime is 91853441. The next prime is 91853497. The reversal of 91853473 is 37435819.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87740689 + 4112784 = 9367^2 + 2028^2 .

It is a cyclic number.

It is not a de Polignac number, because 91853473 - 2⁵ = 91853441 is a prime.

It is not a weakly prime, because it can be changed into another prime (91853423) 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 as a sum of consecutive naturals, namely, 45926736 + 45926737.

It is an arithmetic number, because the mean of its divisors is an integer number (45926737).

Almost surely, 2^91853473 is an apocalyptic number.

It is an amenable number.

91853473 is a deficient number, since it is larger than the sum of its proper divisors (1).

91853473 is an equidigital number, since it uses as much as digits as its factorization.

91853473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 40.

The square root of 91853473 is about 9584.0217549837. The cubic root of 91853473 is about 451.1959512514.

The spelling of 91853473 in words is "ninety-one million, eight hundred fifty-three thousand, four hundred seventy-three".