239739985057 has 4 divisors (see below), whose sum is σ = 240944708800. Its totient is φ = 238535261316.

The previous prime is 239739985049. The next prime is 239739985061. The reversal of 239739985057 is 750589937932.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 239739985057 - 2³ = 239739985049 is a prime.

It is the 489633-rd Hogben number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 239739984983 and 239739985001.

It is not an unprimeable number, because it can be changed into a prime (239739985357) by changing a digit.

It is a nontrivial repunit in base 489632.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 602361573 + ... + 602361970.

It is an arithmetic number, because the mean of its divisors is an integer number (60236177200).

Almost surely, 2^239739985057 is an apocalyptic number.

It is an amenable number.

239739985057 is a deficient number, since it is larger than the sum of its proper divisors (1204723743).

239739985057 is a wasteful number, since it uses less digits than its factorization.

239739985057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1204723742.

The product of its (nonzero) digits is 128595600, while the sum is 67.

The spelling of 239739985057 in words is "two hundred thirty-nine billion, seven hundred thirty-nine million, nine hundred eighty-five thousand, fifty-seven".