239288870897 has 4 divisors (see below), whose sum is σ = 245756137716. Its totient is φ = 232821604080.

The previous prime is 239288870867. The next prime is 239288870903. The reversal of 239288870897 is 798078882932.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 220260323761 + 19028547136 = 469319^2 + 137944^2 .

It is a cyclic number.

It is not a de Polignac number, because 239288870897 - 2⁸ = 239288870641 is a prime.

It is a super-2 number, since 2×239288870897² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 239288870897.

It is not an unprimeable number, because it can be changed into a prime (239288870867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3233633354 + ... + 3233633427.

It is an arithmetic number, because the mean of its divisors is an integer number (61439034429).

Almost surely, 2^239288870897 is an apocalyptic number.

It is an amenable number.

239288870897 is a deficient number, since it is larger than the sum of its proper divisors (6467266819).

239288870897 is an equidigital number, since it uses as much as digits as its factorization.

239288870897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6467266818.

The product of its (nonzero) digits is 195084288, while the sum is 71.

The spelling of 239288870897 in words is "two hundred thirty-nine billion, two hundred eighty-eight million, eight hundred seventy thousand, eight hundred ninety-seven".