91393966 has 8 divisors (see below), whose sum is σ = 137131704. Its totient is φ = 45683400.

The previous prime is 91393919. The next prime is 91393979. The reversal of 91393966 is 66939319.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8541 + ... + 15991.

It is an arithmetic number, because the mean of its divisors is an integer number (17141463).

Almost surely, 2^91393966 is an apocalyptic number.

91393966 is a deficient number, since it is larger than the sum of its proper divisors (45737738).

91393966 is a wasteful number, since it uses less digits than its factorization.

91393966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13586.

The product of its digits is 236196, while the sum is 46.

The square root of 91393966 is about 9560.0191422402. The cubic root of 91393966 is about 450.4423074979.

The spelling of 91393966 in words is "ninety-one million, three hundred ninety-three thousand, nine hundred sixty-six".