91063968 has 48 divisors (see below), whose sum is σ = 253108800. Its totient is φ = 28568576.

The previous prime is 91063967. The next prime is 91063991. The reversal of 91063968 is 86936019.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (91063967) 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, 26268 + ... + 29531.

It is an arithmetic number, because the mean of its divisors is an integer number (5273100).

Almost surely, 2^91063968 is an apocalyptic number.

It is an amenable number.

91063968 is an abundant number, since it is smaller than the sum of its proper divisors (162044832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91063968 is a wasteful number, since it uses less digits than its factorization.

91063968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55829 (or 55821 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 91063968 is about 9542.7442593837. The cubic root of 91063968 is about 449.8995133651.

The spelling of 91063968 in words is "ninety-one million, sixty-three thousand, nine hundred sixty-eight".