87380009 has 2 divisors, whose sum is σ = 87380010. Its totient is φ = 87380008.

The previous prime is 87379997. The next prime is 87380011. The reversal of 87380009 is 90008378.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62410000 + 24970009 = 7900^2 + 4997^2 .

It is a cyclic number.

It is not a de Polignac number, because 87380009 - 2²⁴ = 70602793 is a prime.

Together with 87380011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87380039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43690004 + 43690005.

It is an arithmetic number, because the mean of its divisors is an integer number (43690005).

Almost surely, 2^87380009 is an apocalyptic number.

It is an amenable number.

87380009 is a deficient number, since it is larger than the sum of its proper divisors (1).

87380009 is an equidigital number, since it uses as much as digits as its factorization.

87380009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 87380009 is about 9347.7274778419. The cubic root of 87380009 is about 443.7489737727.

The spelling of 87380009 in words is "eighty-seven million, three hundred eighty thousand, nine".