87532513 has 2 divisors, whose sum is σ = 87532514. Its totient is φ = 87532512.

The previous prime is 87532481. The next prime is 87532519. The reversal of 87532513 is 31523578.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86434209 + 1098304 = 9297^2 + 1048^2 .

It is a cyclic number.

It is not a de Polignac number, because 87532513 - 2⁵ = 87532481 is a prime.

It is not a weakly prime, because it can be changed into another prime (87532519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43766256 + 43766257.

It is an arithmetic number, because the mean of its divisors is an integer number (43766257).

Almost surely, 2^87532513 is an apocalyptic number.

It is an amenable number.

87532513 is a deficient number, since it is larger than the sum of its proper divisors (1).

87532513 is an equidigital number, since it uses as much as digits as its factorization.

87532513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 34.

The square root of 87532513 is about 9355.8811984762. The cubic root of 87532513 is about 444.0069815340.

The spelling of 87532513 in words is "eighty-seven million, five hundred thirty-two thousand, five hundred thirteen".