91980954 has 48 divisors (see below), whose sum is σ = 221356800. Its totient is φ = 28299024.

The previous prime is 91980907. The next prime is 91980961. The reversal of 91980954 is 45908919.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4087 + ... + 14165.

It is an arithmetic number, because the mean of its divisors is an integer number (4611600).

Almost surely, 2^91980954 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91980954, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110678400).

91980954 is an abundant number, since it is smaller than the sum of its proper divisors (129375846).

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

91980954 is a wasteful number, since it uses less digits than its factorization.

91980954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10116 (or 10097 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 91980954 is about 9590.6701538526. The cubic root of 91980954 is about 451.4045890598.

The spelling of 91980954 in words is "ninety-one million, nine hundred eighty thousand, nine hundred fifty-four".