91063885 has 8 divisors (see below), whose sum is σ = 119210976. Its totient is φ = 66228240.

The previous prime is 91063879. The next prime is 91063901. The reversal of 91063885 is 58836019.

It is a happy number.

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

It is not a de Polignac number, because 91063885 - 2⁷ = 91063757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 827799 + ... + 827908.

It is an arithmetic number, because the mean of its divisors is an integer number (14901372).

Almost surely, 2^91063885 is an apocalyptic number.

It is an amenable number.

91063885 is a deficient number, since it is larger than the sum of its proper divisors (28147091).

91063885 is a wasteful number, since it uses less digits than its factorization.

91063885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655723.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 91063885 is about 9542.7399105288. The cubic root of 91063885 is about 449.8993766785.

The spelling of 91063885 in words is "ninety-one million, sixty-three thousand, eight hundred eighty-five".