87982709 has 2 divisors, whose sum is σ = 87982710. Its totient is φ = 87982708.

The previous prime is 87982669. The next prime is 87982733. The reversal of 87982709 is 90728978.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87478609 + 504100 = 9353^2 + 710^2 .

It is a cyclic number.

It is not a de Polignac number, because 87982709 - 2¹² = 87978613 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87982759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43991354 + 43991355.

It is an arithmetic number, because the mean of its divisors is an integer number (43991355).

Almost surely, 2^87982709 is an apocalyptic number.

It is an amenable number.

87982709 is a deficient number, since it is larger than the sum of its proper divisors (1).

87982709 is an equidigital number, since it uses as much as digits as its factorization.

87982709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 50.

The square root of 87982709 is about 9379.9098609741. The cubic root of 87982709 is about 444.7668837512.

The spelling of 87982709 in words is "eighty-seven million, nine hundred eighty-two thousand, seven hundred nine".