850031129 has 4 divisors (see below), whose sum is σ = 877451520. Its totient is φ = 822610740.

The previous prime is 850031111. The next prime is 850031173. The reversal of 850031129 is 921130058.

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 a de Polignac number, because none of the positive numbers 2^k-850031129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (850031179) 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, 13710149 + ... + 13710210.

It is an arithmetic number, because the mean of its divisors is an integer number (219362880).

Almost surely, 2^850031129 is an apocalyptic number.

It is an amenable number.

850031129 is a deficient number, since it is larger than the sum of its proper divisors (27420391).

850031129 is a wasteful number, since it uses less digits than its factorization.

850031129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27420390.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 850031129 is about 29155.2933272845. The cubic root of 850031129 is about 947.2798007753.

The spelling of 850031129 in words is "eight hundred fifty million, thirty-one thousand, one hundred twenty-nine".