91553171 has 2 divisors, whose sum is σ = 91553172. Its totient is φ = 91553170.

The previous prime is 91553141. The next prime is 91553183. The reversal of 91553171 is 17135519.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91553171 - 2⁶ = 91553107 is a prime.

It is a Chen prime.

It is equal to p_5301869 and since 91553171 and 5301869 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (91553141) 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, 45776585 + 45776586.

It is an arithmetic number, because the mean of its divisors is an integer number (45776586).

Almost surely, 2^91553171 is an apocalyptic number.

91553171 is a deficient number, since it is larger than the sum of its proper divisors (1).

91553171 is an equidigital number, since it uses as much as digits as its factorization.

91553171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4725, while the sum is 32.

The square root of 91553171 is about 9568.3421239000. The cubic root of 91553171 is about 450.7037072039.

The spelling of 91553171 in words is "ninety-one million, five hundred fifty-three thousand, one hundred seventy-one".