91671417 has 6 divisors (see below), whose sum is σ = 132414282. Its totient is φ = 61114272.

The previous prime is 91671403. The next prime is 91671421. The reversal of 91671417 is 71417619.

It can be written as a sum of positive squares in only one way, i.e., 80622441 + 11048976 = 8979^2 + 3324^2 .

It is not a de Polignac number, because 91671417 - 2⁸ = 91671161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91671457) 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 in 5 ways as a sum of consecutive naturals, for example, 5092848 + ... + 5092865.

It is an arithmetic number, because the mean of its divisors is an integer number (22069047).

Almost surely, 2^91671417 is an apocalyptic number.

It is an amenable number.

91671417 is a deficient number, since it is larger than the sum of its proper divisors (40742865).

91671417 is a wasteful number, since it uses less digits than its factorization.

91671417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10185719 (or 10185716 counting only the distinct ones).

The product of its digits is 10584, while the sum is 36.

The square root of 91671417 is about 9574.5191524170. The cubic root of 91671417 is about 450.8976600090.

The spelling of 91671417 in words is "ninety-one million, six hundred seventy-one thousand, four hundred seventeen".