91493866 has 16 divisors (see below), whose sum is σ = 142145280. Its totient is φ = 44139760.

The previous prime is 91493863. The next prime is 91493879. The reversal of 91493866 is 66839419.

It is a super-2 number, since 2×91493866² = 16742255031251912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91493861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181 + ... + 13528.

It is an arithmetic number, because the mean of its divisors is an integer number (8884080).

Almost surely, 2^91493866 is an apocalyptic number.

91493866 is a deficient number, since it is larger than the sum of its proper divisors (50651414).

91493866 is a wasteful number, since it uses less digits than its factorization.

91493866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13829.

The product of its digits is 279936, while the sum is 46.

The square root of 91493866 is about 9565.2426001644. The cubic root of 91493866 is about 450.6063693891.

The spelling of 91493866 in words is "ninety-one million, four hundred ninety-three thousand, eight hundred sixty-six".