91945854 has 216 divisors, whose sum is σ = 282712248. Its totient is φ = 22044960.

The previous prime is 91945853. The next prime is 91945873. The reversal of 91945854 is 45854919.

Its product of digits (259200) is a multiple of the sum of its prime divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91945853) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 7072752 + ... + 7072764.

It is an arithmetic number, because the mean of its divisors is an integer number (1308853).

Almost surely, 2^91945854 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91945854, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141356124).

91945854 is an abundant number, since it is smaller than the sum of its proper divisors (190766394).

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

91945854 is a wasteful number, since it uses less digits than its factorization.

91945854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64 (or 36 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 91945854 is about 9588.8400758382. The cubic root of 91945854 is about 451.3471629797.

The spelling of 91945854 in words is "ninety-one million, nine hundred forty-five thousand, eight hundred fifty-four".