87527729 has 2 divisors, whose sum is σ = 87527730. Its totient is φ = 87527728.

The previous prime is 87527717. The next prime is 87527731. The reversal of 87527729 is 92772578.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85525504 + 2002225 = 9248^2 + 1415^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87527729 is a prime.

It is a super-2 number, since 2×87527729² = 15322206687794882, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 87527731, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (87527749) 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, 43763864 + 43763865.

It is an arithmetic number, because the mean of its divisors is an integer number (43763865).

Almost surely, 2^87527729 is an apocalyptic number.

It is an amenable number.

87527729 is a deficient number, since it is larger than the sum of its proper divisors (1).

87527729 is an equidigital number, since it uses as much as digits as its factorization.

87527729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 493920, while the sum is 47.

The square root of 87527729 is about 9355.6255269223. The cubic root of 87527729 is about 443.9988924708.

The spelling of 87527729 in words is "eighty-seven million, five hundred twenty-seven thousand, seven hundred twenty-nine".