87701609 has 2 divisors, whose sum is σ = 87701610. Its totient is φ = 87701608.

The previous prime is 87701569. The next prime is 87701641. The reversal of 87701609 is 90610778.

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., 74011609 + 13690000 = 8603^2 + 3700^2 .

It is a cyclic number.

It is not a de Polignac number, because 87701609 - 2¹² = 87697513 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (87701699) 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, 43850804 + 43850805.

It is an arithmetic number, because the mean of its divisors is an integer number (43850805).

Almost surely, 2^87701609 is an apocalyptic number.

It is an amenable number.

87701609 is a deficient number, since it is larger than the sum of its proper divisors (1).

87701609 is an equidigital number, since it uses as much as digits as its factorization.

87701609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 87701609 is about 9364.9137209053. The cubic root of 87701609 is about 444.2927096870.

The spelling of 87701609 in words is "eighty-seven million, seven hundred one thousand, six hundred nine".