827857957 has 2 divisors, whose sum is σ = 827857958. Its totient is φ = 827857956.

The previous prime is 827857939. The next prime is 827857997. The reversal of 827857957 is 759758728.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 776792641 + 51065316 = 27871^2 + 7146^2 .

It is a cyclic number.

It is not a de Polignac number, because 827857957 - 2¹⁹ = 827333669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (827857907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 413928978 + 413928979.

It is an arithmetic number, because the mean of its divisors is an integer number (413928979).

Almost surely, 2^827857957 is an apocalyptic number.

It is an amenable number.

827857957 is a deficient number, since it is larger than the sum of its proper divisors (1).

827857957 is an equidigital number, since it uses as much as digits as its factorization.

827857957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9878400, while the sum is 58.

The square root of 827857957 is about 28772.5208662710. The cubic root of 827857957 is about 938.9704878476.

The spelling of 827857957 in words is "eight hundred twenty-seven million, eight hundred fifty-seven thousand, nine hundred fifty-seven".