87209347 has 2 divisors, whose sum is σ = 87209348. Its totient is φ = 87209346.

The previous prime is 87209341. The next prime is 87209363. The reversal of 87209347 is 74390278.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87209347 - 2¹⁹ = 86685059 is a prime.

It is not a weakly prime, because it can be changed into another prime (87209341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43604673 + 43604674.

It is an arithmetic number, because the mean of its divisors is an integer number (43604674).

Almost surely, 2^87209347 is an apocalyptic number.

87209347 is a deficient number, since it is larger than the sum of its proper divisors (1).

87209347 is an equidigital number, since it uses as much as digits as its factorization.

87209347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 87209347 is about 9338.5944873948. The cubic root of 87209347 is about 443.4598899373.

The spelling of 87209347 in words is "eighty-seven million, two hundred nine thousand, three hundred forty-seven".