229638749 has 2 divisors, whose sum is σ = 229638750. Its totient is φ = 229638748.

The previous prime is 229638743. The next prime is 229638767. The reversal of 229638749 is 947836922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177076249 + 52562500 = 13307^2 + 7250^2 .

It is a cyclic number.

It is not a de Polignac number, because 229638749 - 2¹² = 229634653 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 229638697 and 229638706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (229638743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114819374 + 114819375.

It is an arithmetic number, because the mean of its divisors is an integer number (114819375).

Almost surely, 2^229638749 is an apocalyptic number.

It is an amenable number.

229638749 is a deficient number, since it is larger than the sum of its proper divisors (1).

229638749 is an equidigital number, since it uses as much as digits as its factorization.

229638749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 50.

The square root of 229638749 is about 15153.8361149908. The cubic root of 229638749 is about 612.3716229072.

The spelling of 229638749 in words is "two hundred twenty-nine million, six hundred thirty-eight thousand, seven hundred forty-nine".