40403999 has 2 divisors, whose sum is σ = 40404000. Its totient is φ = 40403998.

The previous prime is 40403981. The next prime is 40404017. The reversal of 40403999 is 99930404.

It is a balanced prime because it is at equal distance from previous prime (40403981) and next prime (40404017).

It is a cyclic number.

It is not a de Polignac number, because 40403999 - 2⁸ = 40403743 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40403929) 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, 20201999 + 20202000.

It is an arithmetic number, because the mean of its divisors is an integer number (20202000).

Almost surely, 2^40403999 is an apocalyptic number.

40403999 is a deficient number, since it is larger than the sum of its proper divisors (1).

40403999 is an equidigital number, since it uses as much as digits as its factorization.

40403999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 40403999 is about 6356.4140047672. The cubic root of 40403999 is about 343.1427155881.

The spelling of 40403999 in words is "forty million, four hundred three thousand, nine hundred ninety-nine".