91854539 has 8 divisors (see below), whose sum is σ = 105040128. Its totient is φ = 78684840.

The previous prime is 91854517. The next prime is 91854541. The reversal of 91854539 is 93545819.

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 91854539 - 2⁸ = 91854283 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91854539.

It is not an unprimeable number, because it can be changed into a prime (91854589) 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, 13634 + ... + 19224.

It is an arithmetic number, because the mean of its divisors is an integer number (13130016).

Almost surely, 2^91854539 is an apocalyptic number.

91854539 is a deficient number, since it is larger than the sum of its proper divisors (13185589).

91854539 is a wasteful number, since it uses less digits than its factorization.

91854539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7945.

The product of its digits is 194400, while the sum is 44.

The square root of 91854539 is about 9584.0773682186. The cubic root of 91854539 is about 451.1976966872.

The spelling of 91854539 in words is "ninety-one million, eight hundred fifty-four thousand, five hundred thirty-nine".