850129539 has 8 divisors (see below), whose sum is σ = 1295435520. Its totient is φ = 485788296.

The previous prime is 850129481. The next prime is 850129543. The reversal of 850129539 is 935921058.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 850129539 - 2¹⁶ = 850064003 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 850129539.

It is not an unprimeable number, because it can be changed into a prime (850129549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20241159 + ... + 20241200.

It is an arithmetic number, because the mean of its divisors is an integer number (161929440).

Almost surely, 2^850129539 is an apocalyptic number.

850129539 is a deficient number, since it is larger than the sum of its proper divisors (445305981).

850129539 is a wasteful number, since it uses less digits than its factorization.

850129539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40482369.

The product of its (nonzero) digits is 97200, while the sum is 42.

The square root of 850129539 is about 29156.9809651137. The cubic root of 850129539 is about 947.3163555966.

The spelling of 850129539 in words is "eight hundred fifty million, one hundred twenty-nine thousand, five hundred thirty-nine".