91208053 has 2 divisors, whose sum is σ = 91208054. Its totient is φ = 91208052.

The previous prime is 91208027. The next prime is 91208057. The reversal of 91208053 is 35080219.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54508689 + 36699364 = 7383^2 + 6058^2 .

It is a cyclic number.

It is not a de Polignac number, because 91208053 - 2⁵ = 91208021 is a prime.

It is equal to p_5283037 and since 91208053 and 5283037 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91208057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45604026 + 45604027.

It is an arithmetic number, because the mean of its divisors is an integer number (45604027).

Almost surely, 2^91208053 is an apocalyptic number.

It is an amenable number.

91208053 is a deficient number, since it is larger than the sum of its proper divisors (1).

91208053 is an equidigital number, since it uses as much as digits as its factorization.

91208053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 91208053 is about 9550.2907285590. The cubic root of 91208053 is about 450.1366712440.

The spelling of 91208053 in words is "ninety-one million, two hundred eight thousand, fifty-three".