400342003 has 2 divisors, whose sum is σ = 400342004. Its totient is φ = 400342002.

The previous prime is 400341983. The next prime is 400342039. The reversal of 400342003 is 300243004.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400342003 is a prime.

It is not a weakly prime, because it can be changed into another prime (400342043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200171001 + 200171002.

It is an arithmetic number, because the mean of its divisors is an integer number (200171002).

Almost surely, 2^400342003 is an apocalyptic number.

400342003 is a deficient number, since it is larger than the sum of its proper divisors (1).

400342003 is an equidigital number, since it uses as much as digits as its factorization.

400342003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 400342003 is about 20008.5482481863. The cubic root of 400342003 is about 737.0162315458.

Adding to 400342003 its reverse (300243004), we get a palindrome (700585007).

The spelling of 400342003 in words is "four hundred million, three hundred forty-two thousand, three".