40351009 has 2 divisors, whose sum is σ = 40351010. Its totient is φ = 40351008.

The previous prime is 40350997. The next prime is 40351027. The reversal of 40351009 is 90015304.

40351009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28654609 + 11696400 = 5353^2 + 3420^2 .

It is a cyclic number.

It is not a de Polignac number, because 40351009 - 2⁷ = 40350881 is a prime.

It is not a weakly prime, because it can be changed into another prime (40351099) 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, 20175504 + 20175505.

It is an arithmetic number, because the mean of its divisors is an integer number (20175505).

Almost surely, 2^40351009 is an apocalyptic number.

It is an amenable number.

40351009 is a deficient number, since it is larger than the sum of its proper divisors (1).

40351009 is an equidigital number, since it uses as much as digits as its factorization.

40351009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 40351009 is about 6352.2444065070. The cubic root of 40351009 is about 342.9926389635.

The spelling of 40351009 in words is "forty million, three hundred fifty-one thousand, nine".