999987227 has 2 divisors, whose sum is σ = 999987228. Its totient is φ = 999987226.

The previous prime is 999987211. The next prime is 999987281. The reversal of 999987227 is 722789999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999987227 - 2⁴ = 999987211 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999987227.

It is not a weakly prime, because it can be changed into another prime (999987427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499993613 + 499993614.

It is an arithmetic number, because the mean of its divisors is an integer number (499993614).

Almost surely, 2^999987227 is an apocalyptic number.

999987227 is a deficient number, since it is larger than the sum of its proper divisors (1).

999987227 is an equidigital number, since it uses as much as digits as its factorization.

999987227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10287648, while the sum is 62.

The square root of 999987227 is about 31622.5746421761. The cubic root of 999987227 is about 999.9957423152.

The spelling of 999987227 in words is "nine hundred ninety-nine million, nine hundred eighty-seven thousand, two hundred twenty-seven".