91659671 has 8 divisors (see below), whose sum is σ = 93172800. Its totient is φ = 90155520.

The previous prime is 91659593. The next prime is 91659683. The reversal of 91659671 is 17695619.

It is a happy number.

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 91659671 - 2¹⁴ = 91643287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91679671) 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 7 ways as a sum of consecutive naturals, for example, 20135 + ... + 24263.

It is an arithmetic number, because the mean of its divisors is an integer number (11646600).

Almost surely, 2^91659671 is an apocalyptic number.

91659671 is a deficient number, since it is larger than the sum of its proper divisors (1513129).

91659671 is a wasteful number, since it uses less digits than its factorization.

91659671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4489.

The product of its digits is 102060, while the sum is 44.

The square root of 91659671 is about 9573.9057338163. The cubic root of 91659671 is about 450.8784011156.

The spelling of 91659671 in words is "ninety-one million, six hundred fifty-nine thousand, six hundred seventy-one".