856830047 has 2 divisors, whose sum is σ = 856830048. Its totient is φ = 856830046.

The previous prime is 856830019. The next prime is 856830089. The reversal of 856830047 is 740038658.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 856830047 - 2⁶ = 856829983 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 856829986 and 856830013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856830847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428415023 + 428415024.

It is an arithmetic number, because the mean of its divisors is an integer number (428415024).

Almost surely, 2^856830047 is an apocalyptic number.

856830047 is a deficient number, since it is larger than the sum of its proper divisors (1).

856830047 is an equidigital number, since it uses as much as digits as its factorization.

856830047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 856830047 is about 29271.6594507384. The cubic root of 856830047 is about 949.7986819947.

The spelling of 856830047 in words is "eight hundred fifty-six million, eight hundred thirty thousand, forty-seven".