91417471 has 2 divisors, whose sum is σ = 91417472. Its totient is φ = 91417470.

The previous prime is 91417429. The next prime is 91417477. The reversal of 91417471 is 17471419.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91417471 - 2¹⁵ = 91384703 is a prime.

It is a super-3 number, since 3×91417471³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91417477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45708735 + 45708736.

It is an arithmetic number, because the mean of its divisors is an integer number (45708736).

Almost surely, 2^91417471 is an apocalyptic number.

91417471 is a deficient number, since it is larger than the sum of its proper divisors (1).

91417471 is an equidigital number, since it uses as much as digits as its factorization.

91417471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 34.

The square root of 91417471 is about 9561.2484017517. The cubic root of 91417471 is about 450.4809195981.

The spelling of 91417471 in words is "ninety-one million, four hundred seventeen thousand, four hundred seventy-one".