827090221 has 2 divisors, whose sum is σ = 827090222. Its totient is φ = 827090220.

The previous prime is 827090183. The next prime is 827090291. The reversal of 827090221 is 122090728.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 486687721 + 340402500 = 22061^2 + 18450^2 .

It is a cyclic number.

It is not a de Polignac number, because 827090221 - 2¹¹ = 827088173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (827090291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 413545110 + 413545111.

It is an arithmetic number, because the mean of its divisors is an integer number (413545111).

Almost surely, 2^827090221 is an apocalyptic number.

It is an amenable number.

827090221 is a deficient number, since it is larger than the sum of its proper divisors (1).

827090221 is an equidigital number, since it uses as much as digits as its factorization.

827090221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 827090221 is about 28759.1762920985. The cubic root of 827090221 is about 938.6801383587.

The spelling of 827090221 in words is "eight hundred twenty-seven million, ninety thousand, two hundred twenty-one".