402431303 has 2 divisors, whose sum is σ = 402431304. Its totient is φ = 402431302.

The previous prime is 402431273. The next prime is 402431311. The reversal of 402431303 is 303134204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402431303 - 2⁸ = 402431047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402431383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201215651 + 201215652.

It is an arithmetic number, because the mean of its divisors is an integer number (201215652).

Almost surely, 2^402431303 is an apocalyptic number.

402431303 is a deficient number, since it is larger than the sum of its proper divisors (1).

402431303 is an equidigital number, since it uses as much as digits as its factorization.

402431303 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 20.

The square root of 402431303 is about 20060.6904916057. The cubic root of 402431303 is about 738.2961180988.

Adding to 402431303 its reverse (303134204), we get a palindrome (705565507).

The spelling of 402431303 in words is "four hundred two million, four hundred thirty-one thousand, three hundred three".