99987529 has 2 divisors, whose sum is σ = 99987530. Its totient is φ = 99987528.

The previous prime is 99987497. The next prime is 99987539. The reversal of 99987529 is 92578999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64561225 + 35426304 = 8035^2 + 5952^2 .

It is a cyclic number.

It is not a de Polignac number, because 99987529 - 2⁵ = 99987497 is a prime.

It is not a weakly prime, because it can be changed into another prime (99987539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49993764 + 49993765.

It is an arithmetic number, because the mean of its divisors is an integer number (49993765).

Almost surely, 2^99987529 is an apocalyptic number.

It is an amenable number.

99987529 is a deficient number, since it is larger than the sum of its proper divisors (1).

99987529 is an equidigital number, since it uses as much as digits as its factorization.

99987529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3674160, while the sum is 58.

The square root of 99987529 is about 9999.3764305581. The cubic root of 99987529 is about 464.1395874743.

The spelling of 99987529 in words is "ninety-nine million, nine hundred eighty-seven thousand, five hundred twenty-nine".