857227069 has 2 divisors, whose sum is σ = 857227070. Its totient is φ = 857227068.

The previous prime is 857227061. The next prime is 857227073. The reversal of 857227069 is 960722758.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 806276025 + 50951044 = 28395^2 + 7138^2 .

It is a cyclic number.

It is not a de Polignac number, because 857227069 - 2³ = 857227061 is a prime.

It is a super-2 number, since 2×857227069² = 1469676495652661522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (857227061) 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 as a sum of consecutive naturals, namely, 428613534 + 428613535.

It is an arithmetic number, because the mean of its divisors is an integer number (428613535).

Almost surely, 2^857227069 is an apocalyptic number.

It is an amenable number.

857227069 is a deficient number, since it is larger than the sum of its proper divisors (1).

857227069 is an equidigital number, since it uses as much as digits as its factorization.

857227069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 857227069 is about 29278.4403443899. The cubic root of 857227069 is about 949.9453593689.

The spelling of 857227069 in words is "eight hundred fifty-seven million, two hundred twenty-seven thousand, sixty-nine".