40451009 has 2 divisors, whose sum is σ = 40451010. Its totient is φ = 40451008.

The previous prime is 40450919. The next prime is 40451017. The reversal of 40451009 is 90015404.

It is a happy number.

40451009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39337984 + 1113025 = 6272^2 + 1055^2 .

It is a cyclic number.

It is not a de Polignac number, because 40451009 - 2¹⁶ = 40385473 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40451309) 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, 20225504 + 20225505.

It is an arithmetic number, because the mean of its divisors is an integer number (20225505).

Almost surely, 2^40451009 is an apocalyptic number.

It is an amenable number.

40451009 is a deficient number, since it is larger than the sum of its proper divisors (1).

40451009 is an equidigital number, since it uses as much as digits as its factorization.

40451009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 40451009 is about 6360.1107694756. The cubic root of 40451009 is about 343.2757460415.

The spelling of 40451009 in words is "forty million, four hundred fifty-one thousand, nine".