870396529 has 4 divisors (see below), whose sum is σ = 878531184. Its totient is φ = 862261876.

The previous prime is 870396509. The next prime is 870396557. The reversal of 870396529 is 925693078.

870396529 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 870396529 - 2¹⁷ = 870265457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (870396509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4067167 + ... + 4067380.

It is an arithmetic number, because the mean of its divisors is an integer number (219632796).

Almost surely, 2^870396529 is an apocalyptic number.

It is an amenable number.

870396529 is a deficient number, since it is larger than the sum of its proper divisors (8134655).

870396529 is a wasteful number, since it uses less digits than its factorization.

870396529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8134654.

The product of its (nonzero) digits is 816480, while the sum is 49.

The square root of 870396529 is about 29502.4834378396. The cubic root of 870396529 is about 954.7852843673.

The spelling of 870396529 in words is "eight hundred seventy million, three hundred ninety-six thousand, five hundred twenty-nine".