91818101 has 8 divisors (see below), whose sum is σ = 95139360. Its totient is φ = 88555792.

The previous prime is 91818049. The next prime is 91818137. The reversal of 91818101 is 10181819.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91818101 - 2¹⁸ = 91555957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91818161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11555 + ... + 17808.

It is an arithmetic number, because the mean of its divisors is an integer number (11892420).

Almost surely, 2^91818101 is an apocalyptic number.

It is an amenable number.

91818101 is a deficient number, since it is larger than the sum of its proper divisors (3321259).

91818101 is a wasteful number, since it uses less digits than its factorization.

91818101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29475.

The product of its (nonzero) digits is 576, while the sum is 29.

The square root of 91818101 is about 9582.1762142010. The cubic root of 91818101 is about 451.1380265599.

It can be divided in two parts, 91818 and 101, that added together give a palindrome (91919).

The spelling of 91818101 in words is "ninety-one million, eight hundred eighteen thousand, one hundred one".