239404016869 has 2 divisors, whose sum is σ = 239404016870. Its totient is φ = 239404016868.

The previous prime is 239404016837. The next prime is 239404016899. The reversal of 239404016869 is 968610404932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 238814983969 + 589032900 = 488687^2 + 24270^2 .

It is a cyclic number.

It is not a de Polignac number, because 239404016869 - 2⁵ = 239404016837 is a prime.

It is a super-2 number, since 2×239404016869² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (239404016899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119702008434 + 119702008435.

It is an arithmetic number, because the mean of its divisors is an integer number (119702008435).

Almost surely, 2^239404016869 is an apocalyptic number.

It is an amenable number.

239404016869 is a deficient number, since it is larger than the sum of its proper divisors (1).

239404016869 is an equidigital number, since it uses as much as digits as its factorization.

239404016869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2239488, while the sum is 52.

The spelling of 239404016869 in words is "two hundred thirty-nine billion, four hundred four million, sixteen thousand, eight hundred sixty-nine".