91061916 has 48 divisors (see below), whose sum is σ = 232364160. Its totient is φ = 27526720.

The previous prime is 91061881. The next prime is 91061923. The reversal of 91061916 is 61916019.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88855 + ... + 89873.

It is an arithmetic number, because the mean of its divisors is an integer number (4840920).

Almost surely, 2^91061916 is an apocalyptic number.

It is an amenable number.

91061916 is an abundant number, since it is smaller than the sum of its proper divisors (141302244).

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

91061916 is a wasteful number, since it uses less digits than its factorization.

91061916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1714 (or 1712 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 91061916 is about 9542.6367425361. The cubic root of 91061916 is about 449.8961340529.

It can be divided in two parts, 910 and 61916, that added together give a palindrome (62826).

The spelling of 91061916 in words is "ninety-one million, sixty-one thousand, nine hundred sixteen".