229912139 has 2 divisors, whose sum is σ = 229912140. Its totient is φ = 229912138.

The previous prime is 229912091. The next prime is 229912157. The reversal of 229912139 is 931219922.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 229912139 - 2²⁴ = 213134923 is a prime.

It is not a weakly prime, because it can be changed into another prime (229912159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114956069 + 114956070.

It is an arithmetic number, because the mean of its divisors is an integer number (114956070).

Almost surely, 2^229912139 is an apocalyptic number.

229912139 is a deficient number, since it is larger than the sum of its proper divisors (1).

229912139 is an equidigital number, since it uses as much as digits as its factorization.

229912139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 38.

The square root of 229912139 is about 15162.8539200244. The cubic root of 229912139 is about 612.6145405116.

The spelling of 229912139 in words is "two hundred twenty-nine million, nine hundred twelve thousand, one hundred thirty-nine".