842564453 has 2 divisors, whose sum is σ = 842564454. Its totient is φ = 842564452.

The previous prime is 842564449. The next prime is 842564461. The reversal of 842564453 is 354465248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 808435489 + 34128964 = 28433^2 + 5842^2 .

It is a cyclic number.

It is not a de Polignac number, because 842564453 - 2² = 842564449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 842564453.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (842564413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421282226 + 421282227.

It is an arithmetic number, because the mean of its divisors is an integer number (421282227).

Almost surely, 2^842564453 is an apocalyptic number.

It is an amenable number.

842564453 is a deficient number, since it is larger than the sum of its proper divisors (1).

842564453 is an equidigital number, since it uses as much as digits as its factorization.

842564453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 460800, while the sum is 41.

The square root of 842564453 is about 29026.9607950953. The cubic root of 842564453 is about 944.4980034919.

The spelling of 842564453 in words is "eight hundred forty-two million, five hundred sixty-four thousand, four hundred fifty-three".