855448417 has 4 divisors (see below), whose sum is σ = 857490480. Its totient is φ = 853406356.

The previous prime is 855448403. The next prime is 855448423. The reversal of 855448417 is 714844558.

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 855448417 - 2⁷ = 855448289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (855448427) 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 in 3 ways as a sum of consecutive naturals, for example, 1020403 + ... + 1021240.

It is an arithmetic number, because the mean of its divisors is an integer number (214372620).

Almost surely, 2^855448417 is an apocalyptic number.

It is an amenable number.

855448417 is a deficient number, since it is larger than the sum of its proper divisors (2042063).

855448417 is a wasteful number, since it uses less digits than its factorization.

855448417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042062.

The product of its digits is 716800, while the sum is 46.

The square root of 855448417 is about 29248.0497982344. The cubic root of 855448417 is about 949.2878936802.

It can be divided in two parts, 85544 and 8417, that added together give a triangular number (93961 = T₄₃₃).

The spelling of 855448417 in words is "eight hundred fifty-five million, four hundred forty-eight thousand, four hundred seventeen".