91641543 has 16 divisors (see below), whose sum is σ = 147859200. Its totient is φ = 49286016.

The previous prime is 91641497. The next prime is 91641547. The reversal of 91641543 is 34514619.

It is not a de Polignac number, because 91641543 - 2⁸ = 91641287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91641547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127993 + ... + 128706.

It is an arithmetic number, because the mean of its divisors is an integer number (9241200).

Almost surely, 2^91641543 is an apocalyptic number.

91641543 is a deficient number, since it is larger than the sum of its proper divisors (56217657).

91641543 is a wasteful number, since it uses less digits than its factorization.

91641543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256726.

The product of its digits is 12960, while the sum is 33.

The square root of 91641543 is about 9572.9589469505. The cubic root of 91641543 is about 450.8486749832.

The spelling of 91641543 in words is "ninety-one million, six hundred forty-one thousand, five hundred forty-three".