91481930 has 32 divisors (see below), whose sum is σ = 179988480. Its totient is φ = 33327360.

The previous prime is 91481927. The next prime is 91481939. The reversal of 91481930 is 3918419.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91481939) 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, 3410 + ... + 13949.

It is an arithmetic number, because the mean of its divisors is an integer number (5624640).

Almost surely, 2^91481930 is an apocalyptic number.

91481930 is a deficient number, since it is larger than the sum of its proper divisors (88506550).

91481930 is a wasteful number, since it uses less digits than its factorization.

91481930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17414.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 91481930 is about 9564.6186541859. The cubic root of 91481930 is about 450.5867736436.

The spelling of 91481930 in words is "ninety-one million, four hundred eighty-one thousand, nine hundred thirty".