229999639 has 2 divisors, whose sum is σ = 229999640. Its totient is φ = 229999638.

The previous prime is 229999631. The next prime is 229999673. The reversal of 229999639 is 936999922.

229999639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 229999639 - 2³ = 229999631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (229999631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114999819 + 114999820.

It is an arithmetic number, because the mean of its divisors is an integer number (114999820).

Almost surely, 2^229999639 is an apocalyptic number.

229999639 is a deficient number, since it is larger than the sum of its proper divisors (1).

229999639 is an equidigital number, since it uses as much as digits as its factorization.

229999639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4251528, while the sum is 58.

The square root of 229999639 is about 15165.7389862809. The cubic root of 229999639 is about 612.6922469690.

The spelling of 229999639 in words is "two hundred twenty-nine million, nine hundred ninety-nine thousand, six hundred thirty-nine".