91481966 has 4 divisors (see below), whose sum is σ = 137222952. Its totient is φ = 45740982.

The previous prime is 91481939. The next prime is 91481969. The reversal of 91481966 is 66918419.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91481969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22870490 + ... + 22870493.

It is an arithmetic number, because the mean of its divisors is an integer number (34305738).

Almost surely, 2^91481966 is an apocalyptic number.

91481966 is a deficient number, since it is larger than the sum of its proper divisors (45740986).

91481966 is a wasteful number, since it uses less digits than its factorization.

91481966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45740985.

The product of its digits is 93312, while the sum is 44.

The square root of 91481966 is about 9564.6205361217. The cubic root of 91481966 is about 450.5868327486.

The spelling of 91481966 in words is "ninety-one million, four hundred eighty-one thousand, nine hundred sixty-six".