420195019109 has 2 divisors, whose sum is σ = 420195019110. Its totient is φ = 420195019108.

The previous prime is 420195019087. The next prime is 420195019117. The reversal of 420195019109 is 901910591024.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 260232616900 + 159962402209 = 510130^2 + 399953^2 .

It is a cyclic number.

It is not a de Polignac number, because 420195019109 - 2⁸ = 420195018853 is a prime.

It is a super-3 number, since 3×420195019109³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420195019199) 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, 210097509554 + 210097509555.

It is an arithmetic number, because the mean of its divisors is an integer number (210097509555).

Almost surely, 2^420195019109 is an apocalyptic number.

It is an amenable number.

420195019109 is a deficient number, since it is larger than the sum of its proper divisors (1).

420195019109 is an equidigital number, since it uses as much as digits as its factorization.

420195019109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 41.

The spelling of 420195019109 in words is "four hundred twenty billion, one hundred ninety-five million, nineteen thousand, one hundred nine".