91830641 has 8 divisors (see below), whose sum is σ = 105012480. Its totient is φ = 78664608.

The previous prime is 91830623. The next prime is 91830643. The reversal of 91830641 is 14603819.

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 91830641 - 2²² = 87636337 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91830598 and 91830607.

It is not an unprimeable number, because it can be changed into a prime (91830643) 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, 13880 + ... + 19398.

It is an arithmetic number, because the mean of its divisors is an integer number (13126560).

Almost surely, 2^91830641 is an apocalyptic number.

It is an amenable number.

91830641 is a deficient number, since it is larger than the sum of its proper divisors (13181839).

91830641 is a wasteful number, since it uses less digits than its factorization.

91830641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7903.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 91830641 is about 9582.8305317375. The cubic root of 91830641 is about 451.1585635900.

The spelling of 91830641 in words is "ninety-one million, eight hundred thirty thousand, six hundred forty-one".