404242140221939 has 2 divisors, whose sum is σ = 404242140221940. Its totient is φ = 404242140221938.

The previous prime is 404242140221929. The next prime is 404242140222047. The reversal of 404242140221939 is 939122041242404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 404242140221939 - 2¹⁶ = 404242140156403 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 404242140221893 and 404242140221902.

It is not a weakly prime, because it can be changed into another prime (404242140221929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202121070110969 + 202121070110970.

It is an arithmetic number, because the mean of its divisors is an integer number (202121070110970).

Almost surely, 2^{404242140221939} is an apocalyptic number.

404242140221939 is a deficient number, since it is larger than the sum of its proper divisors (1).

404242140221939 is an equidigital number, since it uses as much as digits as its factorization.

404242140221939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 995328, while the sum is 47.

The spelling of 404242140221939 in words is "four hundred four trillion, two hundred forty-two billion, one hundred forty million, two hundred twenty-one thousand, nine hundred thirty-nine".