404421502127609 has 2 divisors, whose sum is σ = 404421502127610. Its totient is φ = 404421502127608.

The previous prime is 404421502127593. The next prime is 404421502127611. The reversal of 404421502127609 is 906721205124404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 241566819456400 + 162854682671209 = 15542420^2 + 12761453^2 .

It is a cyclic number.

It is not a de Polignac number, because 404421502127609 - 2⁴ = 404421502127593 is a prime.

Together with 404421502127611, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (404421502127659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202210751063804 + 202210751063805.

It is an arithmetic number, because the mean of its divisors is an integer number (202210751063805).

Almost surely, 2^{404421502127609} is an apocalyptic number.

It is an amenable number.

404421502127609 is a deficient number, since it is larger than the sum of its proper divisors (1).

404421502127609 is an equidigital number, since it uses as much as digits as its factorization.

404421502127609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 404421502127609 in words is "four hundred four trillion, four hundred twenty-one billion, five hundred two million, one hundred twenty-seven thousand, six hundred nine".