850729 has 4 divisors (see below), whose sum is σ = 928080. Its totient is φ = 773380.

The previous prime is 850727. The next prime is 850753. The reversal of 850729 is 927058.

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 850729 - 2¹ = 850727 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 850729.

It is not an unprimeable number, because it can be changed into a prime (850727) 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, 38659 + ... + 38680.

It is an arithmetic number, because the mean of its divisors is an integer number (232020).

2⁸⁵⁰⁷²⁹ is an apocalyptic number.

It is an amenable number.

850729 is a deficient number, since it is larger than the sum of its proper divisors (77351).

850729 is a wasteful number, since it uses less digits than its factorization.

850729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77350.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 850729 is about 922.3497167561. The cubic root of 850729 is about 94.7538967076.

The spelling of 850729 in words is "eight hundred fifty thousand, seven hundred twenty-nine".