40390003 has 2 divisors, whose sum is σ = 40390004. Its totient is φ = 40390002.

The previous prime is 40389997. The next prime is 40390033. The reversal of 40390003 is 30009304.

40390003 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 is a cyclic number.

It is not a de Polignac number, because 40390003 - 2¹³ = 40381811 is a prime.

It is not a weakly prime, because it can be changed into another prime (40390033) 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, 20195001 + 20195002.

It is an arithmetic number, because the mean of its divisors is an integer number (20195002).

Almost surely, 2^40390003 is an apocalyptic number.

40390003 is a deficient number, since it is larger than the sum of its proper divisors (1).

40390003 is an equidigital number, since it uses as much as digits as its factorization.

40390003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 40390003 is about 6355.3129741973. The cubic root of 40390003 is about 343.1030893117.

Adding to 40390003 its reverse (30009304), we get a palindrome (70399307).

The spelling of 40390003 in words is "forty million, three hundred ninety thousand, three".