91686141 has 16 divisors (see below), whose sum is σ = 135979200. Its totient is φ = 61057584.

The previous prime is 91686137. The next prime is 91686157. The reversal of 91686141 is 14168619.

It is a happy number.

It is not a de Polignac number, because 91686141 - 2² = 91686137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91686096 and 91686105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91686121) 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, 45150 + ... + 47136.

It is an arithmetic number, because the mean of its divisors is an integer number (8498700).

Almost surely, 2^91686141 is an apocalyptic number.

It is an amenable number.

91686141 is a deficient number, since it is larger than the sum of its proper divisors (44293059).

91686141 is a wasteful number, since it uses less digits than its factorization.

91686141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3705 (or 3699 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 91686141 is about 9575.2880374431. The cubic root of 91686141 is about 450.9217993462.

The spelling of 91686141 in words is "ninety-one million, six hundred eighty-six thousand, one hundred forty-one".