827288989 has 2 divisors, whose sum is σ = 827288990. Its totient is φ = 827288988.

The previous prime is 827288983. The next prime is 827288993. The reversal of 827288989 is 989882728.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 540562500 + 286726489 = 23250^2 + 16933^2 .

It is a cyclic number.

It is not a de Polignac number, because 827288989 - 2³ = 827288981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (827288981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 413644494 + 413644495.

It is an arithmetic number, because the mean of its divisors is an integer number (413644495).

Almost surely, 2^827288989 is an apocalyptic number.

It is an amenable number.

827288989 is a deficient number, since it is larger than the sum of its proper divisors (1).

827288989 is an equidigital number, since it uses as much as digits as its factorization.

827288989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9289728, while the sum is 61.

The square root of 827288989 is about 28762.6318162994. The cubic root of 827288989 is about 938.7553275076.

The spelling of 827288989 in words is "eight hundred twenty-seven million, two hundred eighty-eight thousand, nine hundred eighty-nine".