229761139 has 2 divisors, whose sum is σ = 229761140. Its totient is φ = 229761138.

The previous prime is 229761131. The next prime is 229761143. The reversal of 229761139 is 931167922.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 229761139 - 2³ = 229761131 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (229761131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114880569 + 114880570.

It is an arithmetic number, because the mean of its divisors is an integer number (114880570).

Almost surely, 2^229761139 is an apocalyptic number.

229761139 is a deficient number, since it is larger than the sum of its proper divisors (1).

229761139 is an equidigital number, since it uses as much as digits as its factorization.

229761139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 40.

The square root of 229761139 is about 15157.8738284761. The cubic root of 229761139 is about 612.4803949854.

It can be divided in two parts, 2297 and 61139, that added together give a palindrome (63436).

The spelling of 229761139 in words is "two hundred twenty-nine million, seven hundred sixty-one thousand, one hundred thirty-nine".