1423020140209 has 2 divisors, whose sum is σ = 1423020140210. Its totient is φ = 1423020140208.

The previous prime is 1423020140197. The next prime is 1423020140249. The reversal of 1423020140209 is 9020410203241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1215605477025 + 207414663184 = 1102545^2 + 455428^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1423020140209 is a prime.

It is a super-3 number, since 3×1423020140209³ (a number of 37 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1423020140249) 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, 711510070104 + 711510070105.

It is an arithmetic number, because the mean of its divisors is an integer number (711510070105).

Almost surely, 2^{1423020140209} is an apocalyptic number.

It is an amenable number.

1423020140209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1423020140209 is an equidigital number, since it uses as much as digits as its factorization.

1423020140209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 1423020140209 in words is "one trillion, four hundred twenty-three billion, twenty million, one hundred forty thousand, two hundred nine".