856091479 has 8 divisors (see below), whose sum is σ = 867460160. Its totient is φ = 844736256.

The previous prime is 856091477. The next prime is 856091497. The reversal of 856091479 is 974190658.

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

It is not a de Polignac number, because 856091479 - 2¹ = 856091477 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 (856091477) 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, 223807 + ... + 227599.

It is an arithmetic number, because the mean of its divisors is an integer number (108432520).

Almost surely, 2^856091479 is an apocalyptic number.

856091479 is a deficient number, since it is larger than the sum of its proper divisors (11368681).

856091479 is a wasteful number, since it uses less digits than its factorization.

856091479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6729.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 856091479 is about 29259.0409788154. The cubic root of 856091479 is about 949.5257019296.

The spelling of 856091479 in words is "eight hundred fifty-six million, ninety-one thousand, four hundred seventy-nine".