40452109 has 2 divisors, whose sum is σ = 40452110. Its totient is φ = 40452108.

The previous prime is 40452107. The next prime is 40452119. The reversal of 40452109 is 90125404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28355625 + 12096484 = 5325^2 + 3478^2 .

It is a cyclic number.

It is not a de Polignac number, because 40452109 - 2¹ = 40452107 is a prime.

Together with 40452107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40452107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20226054 + 20226055.

It is an arithmetic number, because the mean of its divisors is an integer number (20226055).

Almost surely, 2^40452109 is an apocalyptic number.

It is an amenable number.

40452109 is a deficient number, since it is larger than the sum of its proper divisors (1).

40452109 is an equidigital number, since it uses as much as digits as its factorization.

40452109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 40452109 is about 6360.1972453690. The cubic root of 40452109 is about 343.2788576235.

The spelling of 40452109 in words is "forty million, four hundred fifty-two thousand, one hundred nine".