403420243 has 2 divisors, whose sum is σ = 403420244. Its totient is φ = 403420242.

The previous prime is 403420211. The next prime is 403420249. The reversal of 403420243 is 342024304.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 403420243 - 2⁵ = 403420211 is a prime.

It is not a weakly prime, because it can be changed into another prime (403420249) 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, 201710121 + 201710122.

It is an arithmetic number, because the mean of its divisors is an integer number (201710122).

Almost surely, 2^403420243 is an apocalyptic number.

403420243 is a deficient number, since it is larger than the sum of its proper divisors (1).

403420243 is an equidigital number, since it uses as much as digits as its factorization.

403420243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 403420243 is about 20085.3240700766. The cubic root of 403420243 is about 738.9003895983.

Adding to 403420243 its reverse (342024304), we get a palindrome (745444547).

The spelling of 403420243 in words is "four hundred three million, four hundred twenty thousand, two hundred forty-three".