40233409 has 2 divisors, whose sum is σ = 40233410. Its totient is φ = 40233408.

The previous prime is 40233383. The next prime is 40233449. The reversal of 40233409 is 90433204.

40233409 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., 25000000 + 15233409 = 5000^2 + 3903^2 .

It is a cyclic number.

It is not a de Polignac number, because 40233409 - 2²³ = 31844801 is a prime.

It is a super-2 number, since 2×40233409² = 3237454399522562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40233449) 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, 20116704 + 20116705.

It is an arithmetic number, because the mean of its divisors is an integer number (20116705).

Almost surely, 2^40233409 is an apocalyptic number.

It is an amenable number.

40233409 is a deficient number, since it is larger than the sum of its proper divisors (1).

40233409 is an equidigital number, since it uses as much as digits as its factorization.

40233409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 40233409 is about 6342.9810814790. The cubic root of 40233409 is about 342.6591059303.

The spelling of 40233409 in words is "forty million, two hundred thirty-three thousand, four hundred nine".