239986721071 has 2 divisors, whose sum is σ = 239986721072. Its totient is φ = 239986721070.

The previous prime is 239986721063. The next prime is 239986721207. The reversal of 239986721071 is 170127689932.

It is a happy number.

239986721071 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 239986721071 - 2³ = 239986721063 is a prime.

It is a super-4 number, since 4×239986721071⁴ (a number of 47 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (239986721671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119993360535 + 119993360536.

It is an arithmetic number, because the mean of its divisors is an integer number (119993360536).

Almost surely, 2^239986721071 is an apocalyptic number.

239986721071 is a deficient number, since it is larger than the sum of its proper divisors (1).

239986721071 is an equidigital number, since it uses as much as digits as its factorization.

239986721071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2286144, while the sum is 55.

The spelling of 239986721071 in words is "two hundred thirty-nine billion, nine hundred eighty-six million, seven hundred twenty-one thousand, seventy-one".