239999999999 has 2 divisors, whose sum is σ = 240000000000. Its totient is φ = 239999999998.

The previous prime is 239999999989. The next prime is 240000000041. The reversal of 239999999999 is 999999999932.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 239999999999 - 2⁴ = 239999999983 is a prime.

It is a super-9 number, since 9×239999999999⁹ (a number of 104 digits) contains 999999999 as substring.

239999999999 is a modest number, since divided by 999999 gives 239999 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (239999999909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119999999999 + 120000000000.

It is an arithmetic number, because the mean of its divisors is an integer number (120000000000).

Almost surely, 2^239999999999 is an apocalyptic number.

239999999999 is a deficient number, since it is larger than the sum of its proper divisors (1).

239999999999 is an equidigital number, since it uses as much as digits as its factorization.

239999999999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20920706406, while the sum is 95.

The spelling of 239999999999 in words is "two hundred thirty-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".