1331420423 has 2 divisors, whose sum is σ = 1331420424. Its totient is φ = 1331420422.

The previous prime is 1331420411. The next prime is 1331420477. The reversal of 1331420423 is 3240241331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1331420423 - 2²⁴ = 1314643207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331420723) 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, 665710211 + 665710212.

It is an arithmetic number, because the mean of its divisors is an integer number (665710212).

Almost surely, 2^1331420423 is an apocalyptic number.

1331420423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331420423 is an equidigital number, since it uses as much as digits as its factorization.

1331420423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1331420423 is about 36488.6341618866. The cubic root of 1331420423 is about 1100.1158068158.

Adding to 1331420423 its reverse (3240241331), we get a palindrome (4571661754).

The spelling of 1331420423 in words is "one billion, three hundred thirty-one million, four hundred twenty thousand, four hundred twenty-three".