40009201 has 2 divisors, whose sum is σ = 40009202. Its totient is φ = 40009200.

The previous prime is 40009169. The next prime is 40009253. The reversal of 40009201 is 10290004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38626225 + 1382976 = 6215^2 + 1176^2 .

It is a cyclic number.

It is not a de Polignac number, because 40009201 - 2⁵ = 40009169 is a prime.

It is not a weakly prime, because it can be changed into another prime (40009261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20004600 + 20004601.

It is an arithmetic number, because the mean of its divisors is an integer number (20004601).

Almost surely, 2^40009201 is an apocalyptic number.

It is an amenable number.

40009201 is a deficient number, since it is larger than the sum of its proper divisors (1).

40009201 is an equidigital number, since it uses as much as digits as its factorization.

40009201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 40009201 is about 6325.2826814301. The cubic root of 40009201 is about 342.0214098061.

Adding to 40009201 its reverse (10290004), we get a palindrome (50299205).

The spelling of 40009201 in words is "forty million, nine thousand, two hundred one".