40343999 has 2 divisors, whose sum is σ = 40344000. Its totient is φ = 40343998.

The previous prime is 40343987. The next prime is 40344037. The reversal of 40343999 is 99934304.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40343999 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40343929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20171999 + 20172000.

It is an arithmetic number, because the mean of its divisors is an integer number (20172000).

Almost surely, 2^40343999 is an apocalyptic number.

40343999 is a deficient number, since it is larger than the sum of its proper divisors (1).

40343999 is an equidigital number, since it uses as much as digits as its factorization.

40343999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 41.

The square root of 40343999 is about 6351.6926090610. The cubic root of 40343999 is about 342.9727756217.

The spelling of 40343999 in words is "forty million, three hundred forty-three thousand, nine hundred ninety-nine".