99605227 has 16 divisors (see below), whose sum is σ = 109641600. Its totient is φ = 90065920.

The previous prime is 99605213. The next prime is 99605257. The reversal of 99605227 is 72250699.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99605227 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99605227.

It is not an unprimeable number, because it can be changed into a prime (99605257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138174 + ... + 138892.

It is an arithmetic number, because the mean of its divisors is an integer number (6852600).

Almost surely, 2^99605227 is an apocalyptic number.

99605227 is the 8149-th pentagonal number.

99605227 is a deficient number, since it is larger than the sum of its proper divisors (10036373).

99605227 is a wasteful number, since it uses less digits than its factorization.

99605227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 99605227 is about 9980.2418307374. The cubic root of 99605227 is about 463.5472865313.

The spelling of 99605227 in words is "ninety-nine million, six hundred five thousand, two hundred twenty-seven".