421754320741769 has 2 divisors, whose sum is σ = 421754320741770. Its totient is φ = 421754320741768.

The previous prime is 421754320741753. The next prime is 421754320741783. The reversal of 421754320741769 is 967147023457124.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 415507945216144 + 6246375525625 = 20384012^2 + 2499275^2 .

It is a cyclic number.

It is not a de Polignac number, because 421754320741769 - 2⁴ = 421754320741753 is a prime.

It is a super-2 number, since 2×421754320741769² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (421754320741069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210877160370884 + 210877160370885.

It is an arithmetic number, because the mean of its divisors is an integer number (210877160370885).

Almost surely, 2^{421754320741769} is an apocalyptic number.

It is an amenable number.

421754320741769 is a deficient number, since it is larger than the sum of its proper divisors (1).

421754320741769 is an equidigital number, since it uses as much as digits as its factorization.

421754320741769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 71124480, while the sum is 62.

The spelling of 421754320741769 in words is "four hundred twenty-one trillion, seven hundred fifty-four billion, three hundred twenty million, seven hundred forty-one thousand, seven hundred sixty-nine".