855915393 has 4 divisors (see below), whose sum is σ = 1141220528. Its totient is φ = 570610260.

The previous prime is 855915383. The next prime is 855915397. The reversal of 855915393 is 393519558.

It is a happy number.

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 not a de Polignac number, because 855915393 - 2⁴ = 855915377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (855915397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142652563 + ... + 142652568.

It is an arithmetic number, because the mean of its divisors is an integer number (285305132).

Almost surely, 2^855915393 is an apocalyptic number.

It is an amenable number.

855915393 is a deficient number, since it is larger than the sum of its proper divisors (285305135).

855915393 is a wasteful number, since it uses less digits than its factorization.

855915393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285305134.

The product of its digits is 729000, while the sum is 48.

The square root of 855915393 is about 29256.0317370624. The cubic root of 855915393 is about 949.4605960963.

The spelling of 855915393 in words is "eight hundred fifty-five million, nine hundred fifteen thousand, three hundred ninety-three".