239784982987 has 4 divisors (see below), whose sum is σ = 261583617816. Its totient is φ = 217986348160.

The previous prime is 239784982973. The next prime is 239784982991. The reversal of 239784982987 is 789289487932.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 239784982987 - 2¹⁵ = 239784950219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (239784982967) 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, 10899317398 + ... + 10899317419.

It is an arithmetic number, because the mean of its divisors is an integer number (65395904454).

Almost surely, 2^239784982987 is an apocalyptic number.

239784982987 is a deficient number, since it is larger than the sum of its proper divisors (21798634829).

239784982987 is a wasteful number, since it uses less digits than its factorization.

239784982987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21798634828.

The product of its digits is 877879296, while the sum is 76.

The spelling of 239784982987 in words is "two hundred thirty-nine billion, seven hundred eighty-four million, nine hundred eighty-two thousand, nine hundred eighty-seven".