40827209 has 2 divisors, whose sum is σ = 40827210. Its totient is φ = 40827208.

The previous prime is 40827191. The next prime is 40827223. The reversal of 40827209 is 90272804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34810000 + 6017209 = 5900^2 + 2453^2 .

It is a cyclic number.

It is not a de Polignac number, because 40827209 - 2¹⁶ = 40761673 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40827109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20413604 + 20413605.

It is an arithmetic number, because the mean of its divisors is an integer number (20413605).

Almost surely, 2^40827209 is an apocalyptic number.

It is an amenable number.

40827209 is a deficient number, since it is larger than the sum of its proper divisors (1).

40827209 is an equidigital number, since it uses as much as digits as its factorization.

40827209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 40827209 is about 6389.6172811836. The cubic root of 40827209 is about 344.3366347029.

The spelling of 40827209 in words is "forty million, eight hundred twenty-seven thousand, two hundred nine".