42388487987 has 4 divisors (see below), whose sum is σ = 42969152280. Its totient is φ = 41807823696.

The previous prime is 42388487941. The next prime is 42388487993. The reversal of 42388487987 is 78978488324.

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 42388487987 - 2⁸ = 42388487731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42388487087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290332037 + ... + 290332182.

It is an arithmetic number, because the mean of its divisors is an integer number (10742288070).

Almost surely, 2^42388487987 is an apocalyptic number.

42388487987 is a deficient number, since it is larger than the sum of its proper divisors (580664293).

42388487987 is an equidigital number, since it uses as much as digits as its factorization.

42388487987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580664292.

The product of its digits is 173408256, while the sum is 68.

The spelling of 42388487987 in words is "forty-two billion, three hundred eighty-eight million, four hundred eighty-seven thousand, nine hundred eighty-seven".