91896121 has 8 divisors (see below), whose sum is σ = 95033600. Its totient is φ = 88769520.

The previous prime is 91896089. The next prime is 91896173. The reversal of 91896121 is 12169819.

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 91896121 - 2⁵ = 91896089 is a prime.

It is a super-3 number, since 3×91896121³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (91896191) 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, 16795 + ... + 21583.

It is an arithmetic number, because the mean of its divisors is an integer number (11879200).

Almost surely, 2^91896121 is an apocalyptic number.

It is an amenable number.

91896121 is a deficient number, since it is larger than the sum of its proper divisors (3137479).

91896121 is a wasteful number, since it uses less digits than its factorization.

91896121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5439.

The product of its digits is 7776, while the sum is 37.

The square root of 91896121 is about 9586.2464499928. The cubic root of 91896121 is about 451.2657712482.

The spelling of 91896121 in words is "ninety-one million, eight hundred ninety-six thousand, one hundred twenty-one".