855521923 has 8 divisors (see below), whose sum is σ = 906888528. Its totient is φ = 804271104.

The previous prime is 855521921. The next prime is 855521929. The reversal of 855521923 is 329125558.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 855521923 - 2¹ = 855521921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (855521921) 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 7 ways as a sum of consecutive naturals, for example, 13486 + ... + 43507.

It is an arithmetic number, because the mean of its divisors is an integer number (113361066).

Almost surely, 2^855521923 is an apocalyptic number.

855521923 is a deficient number, since it is larger than the sum of its proper divisors (51366605).

855521923 is a wasteful number, since it uses less digits than its factorization.

855521923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57893.

The product of its digits is 108000, while the sum is 40.

The square root of 855521923 is about 29249.3063678440. The cubic root of 855521923 is about 949.3150826788.

The spelling of 855521923 in words is "eight hundred fifty-five million, five hundred twenty-one thousand, nine hundred twenty-three".