856719361 has 8 divisors (see below), whose sum is σ = 870048864. Its totient is φ = 843488640.

The previous prime is 856719359. The next prime is 856719377. The reversal of 856719361 is 163917658.

It is a happy number.

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 856719361 - 2¹ = 856719359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (856719961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7120 + ... + 42001.

It is an arithmetic number, because the mean of its divisors is an integer number (108756108).

It is a Proth number, since it is equal to 26145 ⋅ 2¹⁵ + 1 and 26145 < 2¹⁵.

Almost surely, 2^856719361 is an apocalyptic number.

It is an amenable number.

856719361 is a deficient number, since it is larger than the sum of its proper divisors (13329503).

856719361 is a wasteful number, since it uses less digits than its factorization.

856719361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49391.

The product of its digits is 272160, while the sum is 46.

The square root of 856719361 is about 29269.7687213275. The cubic root of 856719361 is about 949.7577816456.

The spelling of 856719361 in words is "eight hundred fifty-six million, seven hundred nineteen thousand, three hundred sixty-one".