827421449 has 2 divisors, whose sum is σ = 827421450. Its totient is φ = 827421448.

The previous prime is 827421377. The next prime is 827421499. The reversal of 827421449 is 944124728.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 546624400 + 280797049 = 23380^2 + 16757^2 .

It is a cyclic number.

It is not a de Polignac number, because 827421449 - 2¹⁶ = 827355913 is a prime.

It is not a weakly prime, because it can be changed into another prime (827421499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 413710724 + 413710725.

It is an arithmetic number, because the mean of its divisors is an integer number (413710725).

Almost surely, 2^827421449 is an apocalyptic number.

It is an amenable number.

827421449 is a deficient number, since it is larger than the sum of its proper divisors (1).

827421449 is an equidigital number, since it uses as much as digits as its factorization.

827421449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 41.

The square root of 827421449 is about 28764.9343646044. The cubic root of 827421449 is about 938.8054272496.

The spelling of 827421449 in words is "eight hundred twenty-seven million, four hundred twenty-one thousand, four hundred forty-nine".