91016904 has 64 divisors (see below), whose sum is σ = 249258240. Its totient is φ = 27466560.

The previous prime is 91016903. The next prime is 91016923. The reversal of 91016904 is 40961019.

It is not an unprimeable number, because it can be changed into a prime (91016903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80487 + ... + 81609.

It is an arithmetic number, because the mean of its divisors is an integer number (3894660).

Almost surely, 2^91016904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91016904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124629120).

91016904 is an abundant number, since it is smaller than the sum of its proper divisors (158241336).

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

91016904 is a wasteful number, since it uses less digits than its factorization.

91016904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1450 (or 1446 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 91016904 is about 9540.2779833713. The cubic root of 91016904 is about 449.8219937930.

The spelling of 91016904 in words is "ninety-one million, sixteen thousand, nine hundred four".