239123746129 has 4 divisors (see below), whose sum is σ = 239146943076. Its totient is φ = 239100549184.

The previous prime is 239123746111. The next prime is 239123746133. The reversal of 239123746129 is 921647321932.

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 119080206400 + 120043539729 = 345080^2 + 346473^2 .

It is a cyclic number.

It is not a de Polignac number, because 239123746129 - 2⁵ = 239123746097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (239123786129) 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, 11583004 + ... + 11603629.

It is an arithmetic number, because the mean of its divisors is an integer number (59786735769).

Almost surely, 2^239123746129 is an apocalyptic number.

It is an amenable number.

239123746129 is a deficient number, since it is larger than the sum of its proper divisors (23196947).

239123746129 is a wasteful number, since it uses less digits than its factorization.

239123746129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23196946.

The product of its digits is 979776, while the sum is 49.

The spelling of 239123746129 in words is "two hundred thirty-nine billion, one hundred twenty-three million, seven hundred forty-six thousand, one hundred twenty-nine".