870135529 has 2 divisors, whose sum is σ = 870135530. Its totient is φ = 870135528.

The previous prime is 870135527. The next prime is 870135557. The reversal of 870135529 is 925531078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 827885529 + 42250000 = 28773^2 + 6500^2 .

It is a cyclic number.

It is not a de Polignac number, because 870135529 - 2¹ = 870135527 is a prime.

Together with 870135527, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 870135491 and 870135500.

It is not a weakly prime, because it can be changed into another prime (870135523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435067764 + 435067765.

It is an arithmetic number, because the mean of its divisors is an integer number (435067765).

Almost surely, 2^870135529 is an apocalyptic number.

It is an amenable number.

870135529 is a deficient number, since it is larger than the sum of its proper divisors (1).

870135529 is an equidigital number, since it uses as much as digits as its factorization.

870135529 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 870135529 is about 29498.0597497530. The cubic root of 870135529 is about 954.6898397956.

The spelling of 870135529 in words is "eight hundred seventy million, one hundred thirty-five thousand, five hundred twenty-nine".