87382949981 has 2 divisors, whose sum is σ = 87382949982. Its totient is φ = 87382949980.

The previous prime is 87382949963. The next prime is 87382950001. The reversal of 87382949981 is 18994928378.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82790854756 + 4592095225 = 287734^2 + 67765^2 .

It is a cyclic number.

It is not a de Polignac number, because 87382949981 - 2¹⁸ = 87382687837 is a prime.

It is a super-2 number, since 2×87382949981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87382949281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43691474990 + 43691474991.

It is an arithmetic number, because the mean of its divisors is an integer number (43691474991).

Almost surely, 2^87382949981 is an apocalyptic number.

It is an amenable number.

87382949981 is a deficient number, since it is larger than the sum of its proper divisors (1).

87382949981 is an equidigital number, since it uses as much as digits as its factorization.

87382949981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62705664, while the sum is 68.

The spelling of 87382949981 in words is "eighty-seven billion, three hundred eighty-two million, nine hundred forty-nine thousand, nine hundred eighty-one".