91819366 has 4 divisors (see below), whose sum is σ = 137729052. Its totient is φ = 45909682.

The previous prime is 91819361. The next prime is 91819379. The reversal of 91819366 is 66391819.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91819361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22954840 + ... + 22954843.

It is an arithmetic number, because the mean of its divisors is an integer number (34432263).

Almost surely, 2^91819366 is an apocalyptic number.

91819366 is a deficient number, since it is larger than the sum of its proper divisors (45909686).

91819366 is a wasteful number, since it uses less digits than its factorization.

91819366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45909685.

The product of its digits is 69984, while the sum is 43.

The square root of 91819366 is about 9582.2422219437. The cubic root of 91819366 is about 451.1400983626.

The spelling of 91819366 in words is "ninety-one million, eight hundred nineteen thousand, three hundred sixty-six".