420340144381 has 2 divisors, whose sum is σ = 420340144382. Its totient is φ = 420340144380.

The previous prime is 420340144361. The next prime is 420340144453. The reversal of 420340144381 is 183441043024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 420207318756 + 132825625 = 648234^2 + 11525^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420340144381 is a prime.

It is a super-2 number, since 2×420340144381² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420340144351) 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, 210170072190 + 210170072191.

It is an arithmetic number, because the mean of its divisors is an integer number (210170072191).

Almost surely, 2^420340144381 is an apocalyptic number.

It is an amenable number.

420340144381 is a deficient number, since it is larger than the sum of its proper divisors (1).

420340144381 is an equidigital number, since it uses as much as digits as its factorization.

420340144381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36864, while the sum is 34.

The spelling of 420340144381 in words is "four hundred twenty billion, three hundred forty million, one hundred forty-four thousand, three hundred eighty-one".