91329541 has 2 divisors, whose sum is σ = 91329542. Its totient is φ = 91329540.

The previous prime is 91329499. The next prime is 91329571. The reversal of 91329541 is 14592319.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91278916 + 50625 = 9554^2 + 225^2 .

It is a cyclic number.

It is not a de Polignac number, because 91329541 - 2¹¹ = 91327493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91329497 and 91329506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91329571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45664770 + 45664771.

It is an arithmetic number, because the mean of its divisors is an integer number (45664771).

Almost surely, 2^91329541 is an apocalyptic number.

It is an amenable number.

91329541 is a deficient number, since it is larger than the sum of its proper divisors (1).

91329541 is an equidigital number, since it uses as much as digits as its factorization.

91329541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 34.

The square root of 91329541 is about 9556.6490466062. The cubic root of 91329541 is about 450.3364414018.

The spelling of 91329541 in words is "ninety-one million, three hundred twenty-nine thousand, five hundred forty-one".