850379129 has 2 divisors, whose sum is σ = 850379130. Its totient is φ = 850379128.

The previous prime is 850379119. The next prime is 850379171. The reversal of 850379129 is 921973058.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 790734400 + 59644729 = 28120^2 + 7723^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-850379129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 850379129.

It is not a weakly prime, because it can be changed into another prime (850379119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425189564 + 425189565.

It is an arithmetic number, because the mean of its divisors is an integer number (425189565).

Almost surely, 2^850379129 is an apocalyptic number.

It is an amenable number.

850379129 is a deficient number, since it is larger than the sum of its proper divisors (1).

850379129 is an equidigital number, since it uses as much as digits as its factorization.

850379129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 850379129 is about 29161.2607580674. The cubic root of 850379129 is about 947.4090542357.

The spelling of 850379129 in words is "eight hundred fifty million, three hundred seventy-nine thousand, one hundred twenty-nine".