987387783789 has 64 divisors (see below), whose sum is σ = 1527089541120. Its totient is φ = 561636218880.

The previous prime is 987387783773. The next prime is 987387783799.

It is a happy number.

987387783789 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 987387783789 - 2⁴ = 987387783773 is a prime.

It is a super-2 number, since 2×987387783789² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987387783769) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8463357 + ... + 8579229.

It is an arithmetic number, because the mean of its divisors is an integer number (23860774080).

Almost surely, 2^987387783789 is an apocalyptic number.

It is an amenable number.

987387783789 is a deficient number, since it is larger than the sum of its proper divisors (539701757331).

987387783789 is a wasteful number, since it uses less digits than its factorization.

987387783789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116122.

The product of its digits is 7169347584, while the sum is 84.

The spelling of 987387783789 in words is "nine hundred eighty-seven billion, three hundred eighty-seven million, seven hundred eighty-three thousand, seven hundred eighty-nine".