420340144453 has 2 divisors, whose sum is σ = 420340144454. Its totient is φ = 420340144452.

The previous prime is 420340144381. The next prime is 420340144529. The reversal of 420340144453 is 354441043024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 318165939844 + 102174204609 = 564062^2 + 319647^2 .

It is a cyclic number.

It is not a de Polignac number, because 420340144453 - 2²¹ = 420338047301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420340144853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210170072226 + 210170072227.

It is an arithmetic number, because the mean of its divisors is an integer number (210170072227).

Almost surely, 2^420340144453 is an apocalyptic number.

It is an amenable number.

420340144453 is a deficient number, since it is larger than the sum of its proper divisors (1).

420340144453 is an equidigital number, since it uses as much as digits as its factorization.

420340144453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 92160, while the sum is 34.

Adding to 420340144453 its reverse (354441043024), we get a palindrome (774781187477).

The spelling of 420340144453 in words is "four hundred twenty billion, three hundred forty million, one hundred forty-four thousand, four hundred fifty-three".