239989791977 has 8 divisors (see below), whose sum is σ = 272053205760. Its totient is φ = 209869615440.

The previous prime is 239989791973. The next prime is 239989792019. The reversal of 239989791977 is 779197989932.

239989791977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 239989791977 - 2² = 239989791973 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (239989791973) 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 in 7 ways as a sum of consecutive naturals, for example, 485809049 + ... + 485809542.

It is an arithmetic number, because the mean of its divisors is an integer number (34006650720).

Almost surely, 2^239989791977 is an apocalyptic number.

It is an amenable number.

239989791977 is a deficient number, since it is larger than the sum of its proper divisors (32063413783).

239989791977 is a wasteful number, since it uses less digits than its factorization.

239989791977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971618623.

The product of its digits is 972182736, while the sum is 80.

The spelling of 239989791977 in words is "two hundred thirty-nine billion, nine hundred eighty-nine million, seven hundred ninety-one thousand, nine hundred seventy-seven".