856970299 has 2 divisors, whose sum is σ = 856970300. Its totient is φ = 856970298.

The previous prime is 856970297. The next prime is 856970311. The reversal of 856970299 is 992079658.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 856970299 - 2¹ = 856970297 is a prime.

Together with 856970297, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (856970297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428485149 + 428485150.

It is an arithmetic number, because the mean of its divisors is an integer number (428485150).

Almost surely, 2^856970299 is an apocalyptic number.

856970299 is a deficient number, since it is larger than the sum of its proper divisors (1).

856970299 is an equidigital number, since it uses as much as digits as its factorization.

856970299 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2449440, while the sum is 55.

The square root of 856970299 is about 29274.0550487970. The cubic root of 856970299 is about 949.8505024219.

The spelling of 856970299 in words is "eight hundred fifty-six million, nine hundred seventy thousand, two hundred ninety-nine".