421335649093 has 2 divisors, whose sum is σ = 421335649094. Its totient is φ = 421335649092.

The previous prime is 421335649073. The next prime is 421335649109. The reversal of 421335649093 is 390946533124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 356209629889 + 65126019204 = 596833^2 + 255198^2 .

It is a cyclic number.

It is not a de Polignac number, because 421335649093 - 2³³ = 412745714501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421335649013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210667824546 + 210667824547.

It is an arithmetic number, because the mean of its divisors is an integer number (210667824547).

Almost surely, 2^421335649093 is an apocalyptic number.

It is an amenable number.

421335649093 is a deficient number, since it is larger than the sum of its proper divisors (1).

421335649093 is an equidigital number, since it uses as much as digits as its factorization.

421335649093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2099520, while the sum is 49.

The spelling of 421335649093 in words is "four hundred twenty-one billion, three hundred thirty-five million, six hundred forty-nine thousand, ninety-three".