91078853 has 2 divisors, whose sum is σ = 91078854. Its totient is φ = 91078852.

The previous prime is 91078847. The next prime is 91078861. The reversal of 91078853 is 35887019.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49308484 + 41770369 = 7022^2 + 6463^2 .

It is a cyclic number.

It is not a de Polignac number, because 91078853 - 2⁶ = 91078789 is a prime.

It is a Sophie Germain prime.

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 91078853.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91078453) 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, 45539426 + 45539427.

It is an arithmetic number, because the mean of its divisors is an integer number (45539427).

Almost surely, 2^91078853 is an apocalyptic number.

It is an amenable number.

91078853 is a deficient number, since it is larger than the sum of its proper divisors (1).

91078853 is an equidigital number, since it uses as much as digits as its factorization.

91078853 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 91078853 is about 9543.5241394361. The cubic root of 91078853 is about 449.9240250337.

The spelling of 91078853 in words is "ninety-one million, seventy-eight thousand, eight hundred fifty-three".