28420210131409 has 2 divisors, whose sum is σ = 28420210131410. Its totient is φ = 28420210131408.

The previous prime is 28420210131407. The next prime is 28420210131433. The reversal of 28420210131409 is 90413101202482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27744027907600 + 676182223809 = 5267260^2 + 822303^2 .

It is a cyclic number.

It is not a de Polignac number, because 28420210131409 - 2¹ = 28420210131407 is a prime.

Together with 28420210131407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28420210131407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14210105065704 + 14210105065705.

It is an arithmetic number, because the mean of its divisors is an integer number (14210105065705).

Almost surely, 2^{28420210131409} is an apocalyptic number.

It is an amenable number.

28420210131409 is a deficient number, since it is larger than the sum of its proper divisors (1).

28420210131409 is an equidigital number, since it uses as much as digits as its factorization.

28420210131409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 37.

The spelling of 28420210131409 in words is "twenty-eight trillion, four hundred twenty billion, two hundred ten million, one hundred thirty-one thousand, four hundred nine".