855847429 has 4 divisors (see below), whose sum is σ = 856400076. Its totient is φ = 855294784.

The previous prime is 855847427. The next prime is 855847477. The reversal of 855847429 is 924748558.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 538936225 + 316911204 = 23215^2 + 17802^2 .

It is a cyclic number.

It is not a de Polignac number, because 855847429 - 2¹ = 855847427 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855847427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273994 + ... + 277099.

It is an arithmetic number, because the mean of its divisors is an integer number (214100019).

Almost surely, 2^855847429 is an apocalyptic number.

It is an amenable number.

855847429 is a deficient number, since it is larger than the sum of its proper divisors (552647).

855847429 is a wasteful number, since it uses less digits than its factorization.

855847429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552646.

The product of its digits is 3225600, while the sum is 52.

The square root of 855847429 is about 29254.8701757502. The cubic root of 855847429 is about 949.4354647774.

The spelling of 855847429 in words is "eight hundred fifty-five million, eight hundred forty-seven thousand, four hundred twenty-nine".