139566227 has 2 divisors, whose sum is σ = 139566228. Its totient is φ = 139566226.

The previous prime is 139566223. The next prime is 139566239. The reversal of 139566227 is 722665931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139566227 - 2² = 139566223 is a prime.

It is equal to p_7889009 and since 139566227 and 7889009 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (139566223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69783113 + 69783114.

It is an arithmetic number, because the mean of its divisors is an integer number (69783114).

Almost surely, 2^139566227 is an apocalyptic number.

139566227 is a deficient number, since it is larger than the sum of its proper divisors (1).

139566227 is an equidigital number, since it uses as much as digits as its factorization.

139566227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 41.

The square root of 139566227 is about 11813.8150908163. The cubic root of 139566227 is about 518.7125782847.

The spelling of 139566227 in words is "one hundred thirty-nine million, five hundred sixty-six thousand, two hundred twenty-seven".