203440019 has 2 divisors, whose sum is σ = 203440020. Its totient is φ = 203440018.

The previous prime is 203440007. The next prime is 203440031. The reversal of 203440019 is 910044302.

It is a balanced prime because it is at equal distance from previous prime (203440007) and next prime (203440031).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203440019 is a prime.

It is a super-2 number, since 2×203440019² = 82775682661440722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 203439976 and 203440003.

It is not a weakly prime, because it can be changed into another prime (203440099) 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, 101720009 + 101720010.

It is an arithmetic number, because the mean of its divisors is an integer number (101720010).

Almost surely, 2^203440019 is an apocalyptic number.

203440019 is a deficient number, since it is larger than the sum of its proper divisors (1).

203440019 is an equidigital number, since it uses as much as digits as its factorization.

203440019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 203440019 is about 14263.2401297882. The cubic root of 203440019 is about 588.1373980905.

The spelling of 203440019 in words is "two hundred three million, four hundred forty thousand, nineteen".