827426557 has 2 divisors, whose sum is σ = 827426558. Its totient is φ = 827426556.

The previous prime is 827426543. The next prime is 827426563. The reversal of 827426557 is 755624728.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 504182116 + 323244441 = 22454^2 + 17979^2 .

It is a cyclic number.

It is not a de Polignac number, because 827426557 - 2¹¹ = 827424509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (827426507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 413713278 + 413713279.

It is an arithmetic number, because the mean of its divisors is an integer number (413713279).

Almost surely, 2^827426557 is an apocalyptic number.

It is an amenable number.

827426557 is a deficient number, since it is larger than the sum of its proper divisors (1).

827426557 is an equidigital number, since it uses as much as digits as its factorization.

827426557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 940800, while the sum is 46.

The square root of 827426557 is about 28765.0231531282. The cubic root of 827426557 is about 938.8073591181.

The spelling of 827426557 in words is "eight hundred twenty-seven million, four hundred twenty-six thousand, five hundred fifty-seven".