857793702247 has 2 divisors, whose sum is σ = 857793702248. Its totient is φ = 857793702246.

The previous prime is 857793702217. The next prime is 857793702251. The reversal of 857793702247 is 742207397758.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 857793702247 - 2¹¹ = 857793700199 is a prime.

It is a super-2 number, since 2×857793702247² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (857793702217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428896851123 + 428896851124.

It is an arithmetic number, because the mean of its divisors is an integer number (428896851124).

Almost surely, 2^857793702247 is an apocalyptic number.

857793702247 is a deficient number, since it is larger than the sum of its proper divisors (1).

857793702247 is an equidigital number, since it uses as much as digits as its factorization.

857793702247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41489280, while the sum is 61.

The spelling of 857793702247 in words is "eight hundred fifty-seven billion, seven hundred ninety-three million, seven hundred two thousand, two hundred forty-seven".