855243893 has 12 divisors (see below), whose sum is σ = 995882112. Its totient is φ = 732324600.

The previous prime is 855243889. The next prime is 855243911. The reversal of 855243893 is 398342558.

It is not a de Polignac number, because 855243893 - 2² = 855243889 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 (855242893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43196 + ... + 59802.

It is an arithmetic number, because the mean of its divisors is an integer number (82990176).

Almost surely, 2^855243893 is an apocalyptic number.

It is an amenable number.

855243893 is a deficient number, since it is larger than the sum of its proper divisors (140638219).

855243893 is a wasteful number, since it uses less digits than its factorization.

855243893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17672 (or 17665 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 47.

The square root of 855243893 is about 29244.5532193604. The cubic root of 855243893 is about 949.2122344789.

The spelling of 855243893 in words is "eight hundred fifty-five million, two hundred forty-three thousand, eight hundred ninety-three".