40243507 has 2 divisors, whose sum is σ = 40243508. Its totient is φ = 40243506.

The previous prime is 40243499. The next prime is 40243517. The reversal of 40243507 is 70534204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40243507 - 2³ = 40243499 is a prime.

It is not a weakly prime, because it can be changed into another prime (40243517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20121753 + 20121754.

It is an arithmetic number, because the mean of its divisors is an integer number (20121754).

Almost surely, 2^40243507 is an apocalyptic number.

40243507 is a deficient number, since it is larger than the sum of its proper divisors (1).

40243507 is an equidigital number, since it uses as much as digits as its factorization.

40243507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 40243507 is about 6343.7770294991. Note that the first 3 decimals coincide. The cubic root of 40243507 is about 342.6877710148.

The spelling of 40243507 in words is "forty million, two hundred forty-three thousand, five hundred seven".