856283969 has 2 divisors, whose sum is σ = 856283970. Its totient is φ = 856283968.

The previous prime is 856283921. The next prime is 856283977. The reversal of 856283969 is 969382658.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 595945744 + 260338225 = 24412^2 + 16135^2 .

It is a cyclic number.

It is not a de Polignac number, because 856283969 - 2¹² = 856279873 is a prime.

It is a super-2 number, since 2×856283969² = 1466444471132785922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (856288969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428141984 + 428141985.

It is an arithmetic number, because the mean of its divisors is an integer number (428141985).

Almost surely, 2^856283969 is an apocalyptic number.

It is an amenable number.

856283969 is a deficient number, since it is larger than the sum of its proper divisors (1).

856283969 is an equidigital number, since it uses as much as digits as its factorization.

856283969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5598720, while the sum is 56.

The square root of 856283969 is about 29262.3302045480. The cubic root of 856283969 is about 949.5968627459.

The spelling of 856283969 in words is "eight hundred fifty-six million, two hundred eighty-three thousand, nine hundred sixty-nine".