863054191 has 4 divisors (see below), whose sum is σ = 871599384. Its totient is φ = 854509000.

The previous prime is 863054177. The next prime is 863054207. The reversal of 863054191 is 191450368.

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

It is a cyclic number.

It is not a de Polignac number, because 863054191 - 2¹³ = 863045999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 863054191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863054131) 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, 4272445 + ... + 4272646.

It is an arithmetic number, because the mean of its divisors is an integer number (217899846).

Almost surely, 2^863054191 is an apocalyptic number.

863054191 is a deficient number, since it is larger than the sum of its proper divisors (8545193).

863054191 is a wasteful number, since it uses less digits than its factorization.

863054191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8545192.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 863054191 is about 29377.7839702044. The cubic root of 863054191 is about 952.0929630372.

The spelling of 863054191 in words is "eight hundred sixty-three million, fifty-four thousand, one hundred ninety-one".