91816027 has 4 divisors (see below), whose sum is σ = 91873096. Its totient is φ = 91758960.

The previous prime is 91816019. The next prime is 91816057. The reversal of 91816027 is 72061819.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 91816027 - 2³ = 91816019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91815983 and 91816001.

It is not an unprimeable number, because it can be changed into a prime (91816007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26049 + ... + 29362.

It is an arithmetic number, because the mean of its divisors is an integer number (22968274).

Almost surely, 2^91816027 is an apocalyptic number.

91816027 is a deficient number, since it is larger than the sum of its proper divisors (57069).

91816027 is a wasteful number, since it uses less digits than its factorization.

91816027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57068.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 91816027 is about 9582.0679918272. The cubic root of 91816027 is about 451.1346297449.

The spelling of 91816027 in words is "ninety-one million, eight hundred sixteen thousand, twenty-seven".