420201984677 has 2 divisors, whose sum is σ = 420201984678. Its totient is φ = 420201984676.

The previous prime is 420201984623. The next prime is 420201984691. The reversal of 420201984677 is 776489102024.

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., 405923168641 + 14278816036 = 637121^2 + 119494^2 .

It is a cyclic number.

It is not a de Polignac number, because 420201984677 - 2¹⁸ = 420201722533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420201984877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210100992338 + 210100992339.

It is an arithmetic number, because the mean of its divisors is an integer number (210100992339).

Almost surely, 2^420201984677 is an apocalyptic number.

It is an amenable number.

420201984677 is a deficient number, since it is larger than the sum of its proper divisors (1).

420201984677 is an equidigital number, since it uses as much as digits as its factorization.

420201984677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1354752, while the sum is 50.

The spelling of 420201984677 in words is "four hundred twenty billion, two hundred one million, nine hundred eighty-four thousand, six hundred seventy-seven".