856220383 has 2 divisors, whose sum is σ = 856220384. Its totient is φ = 856220382.

The previous prime is 856220377. The next prime is 856220399. The reversal of 856220383 is 383022658.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-856220383 is a prime.

It is a super-2 number, since 2×856220383² = 1466226688529333378, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856220303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428110191 + 428110192.

It is an arithmetic number, because the mean of its divisors is an integer number (428110192).

Almost surely, 2^856220383 is an apocalyptic number.

856220383 is a deficient number, since it is larger than the sum of its proper divisors (1).

856220383 is an equidigital number, since it uses as much as digits as its factorization.

856220383 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 856220383 is about 29261.2437022079. The cubic root of 856220383 is about 949.5733570854.

The spelling of 856220383 in words is "eight hundred fifty-six million, two hundred twenty thousand, three hundred eighty-three".