987754332221 has 16 divisors (see below), whose sum is σ = 1074342066624. Its totient is φ = 904341752064.

The previous prime is 987754332179. The next prime is 987754332251. The reversal of 987754332221 is 122233457789.

It is a cyclic number.

It is not a de Polignac number, because 987754332221 - 2²² = 987750137917 is a prime.

It is a super-3 number, since 3×987754332221³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987754332251) 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 15 ways as a sum of consecutive naturals, for example, 2989946 + ... + 3303828.

It is an arithmetic number, because the mean of its divisors is an integer number (67146379164).

Almost surely, 2^987754332221 is an apocalyptic number.

It is an amenable number.

987754332221 is a deficient number, since it is larger than the sum of its proper divisors (86587734403).

987754332221 is a wasteful number, since it uses less digits than its factorization.

987754332221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318940.

The product of its digits is 5080320, while the sum is 53.

The spelling of 987754332221 in words is "nine hundred eighty-seven billion, seven hundred fifty-four million, three hundred thirty-two thousand, two hundred twenty-one".