42804569987 has 2 divisors, whose sum is σ = 42804569988. Its totient is φ = 42804569986.

The previous prime is 42804569939. The next prime is 42804569989. The reversal of 42804569987 is 78996540824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42804569987 - 2²⁴ = 42787792771 is a prime.

Together with 42804569989, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42804569989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21402284993 + 21402284994.

It is an arithmetic number, because the mean of its divisors is an integer number (21402284994).

Almost surely, 2^42804569987 is an apocalyptic number.

42804569987 is a deficient number, since it is larger than the sum of its proper divisors (1).

42804569987 is an equidigital number, since it uses as much as digits as its factorization.

42804569987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34836480, while the sum is 62.

The spelling of 42804569987 in words is "forty-two billion, eight hundred four million, five hundred sixty-nine thousand, nine hundred eighty-seven".