420462656893 has 2 divisors, whose sum is σ = 420462656894. Its totient is φ = 420462656892.

The previous prime is 420462656839. The next prime is 420462656923. The reversal of 420462656893 is 398656264024.

Together with previous prime (420462656839) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 392110158969 + 28352497924 = 626187^2 + 168382^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420462656893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420462656833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210231328446 + 210231328447.

It is an arithmetic number, because the mean of its divisors is an integer number (210231328447).

Almost surely, 2^420462656893 is an apocalyptic number.

It is an amenable number.

420462656893 is a deficient number, since it is larger than the sum of its proper divisors (1).

420462656893 is an equidigital number, since it uses as much as digits as its factorization.

420462656893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14929920, while the sum is 55.

The spelling of 420462656893 in words is "four hundred twenty billion, four hundred sixty-two million, six hundred fifty-six thousand, eight hundred ninety-three".