87982027621 has 8 divisors (see below), whose sum is σ = 89646468120. Its totient is φ = 86317750272.

The previous prime is 87982027603. The next prime is 87982027657. The reversal of 87982027621 is 12672028978.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 19764423396 + 68217604225 = 140586^2 + 261185^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87982027621 - 2²¹ = 87979930469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87982327621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2076181 + ... + 2118133.

It is an arithmetic number, because the mean of its divisors is an integer number (11205808515).

Almost surely, 2^87982027621 is an apocalyptic number.

It is an amenable number.

87982027621 is a deficient number, since it is larger than the sum of its proper divisors (1664440499).

87982027621 is a wasteful number, since it uses less digits than its factorization.

87982027621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81575.

The product of its (nonzero) digits is 1354752, while the sum is 52.

The spelling of 87982027621 in words is "eighty-seven billion, nine hundred eighty-two million, twenty-seven thousand, six hundred twenty-one".