91000471 has 8 divisors (see below), whose sum is σ = 93056544. Its totient is φ = 88962720.

The previous prime is 91000451. The next prime is 91000499. The reversal of 91000471 is 17400019.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91000471 - 2⁹ = 90999959 is a prime.

It is a super-3 number, since 3×91000471³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91000421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5721 + ... + 14653.

It is an arithmetic number, because the mean of its divisors is an integer number (11632068).

Almost surely, 2^91000471 is an apocalyptic number.

91000471 is a deficient number, since it is larger than the sum of its proper divisors (2056073).

91000471 is a wasteful number, since it uses less digits than its factorization.

91000471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9161.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 91000471 is about 9539.4167012454. The cubic root of 91000471 is about 449.7949205447.

The spelling of 91000471 in words is "ninety-one million, four hundred seventy-one", and thus it is an aban number.