239309978887 has 8 divisors (see below), whose sum is σ = 273722600096. Its totient is φ = 204953728032.

The previous prime is 239309978867. The next prime is 239309978927. The reversal of 239309978887 is 788879903932.

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 239309978887 - 2¹⁵ = 239309946119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (239309978857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14083488 + ... + 14100469.

It is an arithmetic number, because the mean of its divisors is an integer number (34215325012).

Almost surely, 2^239309978887 is an apocalyptic number.

239309978887 is a deficient number, since it is larger than the sum of its proper divisors (34412621209).

239309978887 is a wasteful number, since it uses less digits than its factorization.

239309978887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28185177.

The product of its (nonzero) digits is 329204736, while the sum is 73.

The spelling of 239309978887 in words is "two hundred thirty-nine billion, three hundred nine million, nine hundred seventy-eight thousand, eight hundred eighty-seven".