87348029209 has 9 divisors (see below), whose sum is σ = 101611338591. Its totient is φ = 74867966040.

The previous prime is 87348029207. The next prime is 87348029267. The reversal of 87348029209 is 90292084378.

The square root of 87348029209 is 295547.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 85733596809 + 1614432400 = 292803^2 + 40180^2 .

It is not a de Polignac number, because 87348029209 - 2¹ = 87348029207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87348029207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2047719 + ... + 2089939.

Almost surely, 2^87348029209 is an apocalyptic number.

87348029209 is the 295547-th square number.

87348029209 is the 147774-th centered octagonal number.

It is an amenable number.

87348029209 is a deficient number, since it is larger than the sum of its proper divisors (14263309382).

87348029209 is an frugal number, since it uses more digits than its factorization.

87348029209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84456 (or 42228 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 52.

The spelling of 87348029209 in words is "eighty-seven billion, three hundred forty-eight million, twenty-nine thousand, two hundred nine".