40000003 has 2 divisors, whose sum is σ = 40000004. Its totient is φ = 40000002.

The previous prime is 39999983. The next prime is 40000021. The reversal of 40000003 is 30000004.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40000003 is a prime.

It is not a weakly prime, because it can be changed into another prime (40000033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20000001 + 20000002.

It is an arithmetic number, because the mean of its divisors is an integer number (20000002).

Almost surely, 2^40000003 is an apocalyptic number.

40000003 is a deficient number, since it is larger than the sum of its proper divisors (1).

40000003 is an equidigital number, since it uses as much as digits as its factorization.

40000003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 7.

The square root of 40000003 is about 6324.5555575076. Note that the first 5 decimals coincide. The cubic root of 40000003 is about 341.9951978852.

Adding to 40000003 its reverse (30000004), we get a palindrome (70000007).

Subtracting from 40000003 its reverse (30000004), we obtain a palindrome (9999999).

The spelling of 40000003 in words is "forty million, three", and thus it is an aban number and an uban number.