421754320711837 has 2 divisors, whose sum is σ = 421754320711838. Its totient is φ = 421754320711836.

The previous prime is 421754320711769. The next prime is 421754320711897. The reversal of 421754320711837 is 738117023457124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 411083978342436 + 10670342369401 = 20275206^2 + 3266549^2 .

It is a cyclic number.

It is not a de Polignac number, because 421754320711837 - 2³⁵ = 421719960973469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421754320711897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210877160355918 + 210877160355919.

It is an arithmetic number, because the mean of its divisors is an integer number (210877160355919).

Almost surely, 2^{421754320711837} is an apocalyptic number.

It is an amenable number.

421754320711837 is a deficient number, since it is larger than the sum of its proper divisors (1).

421754320711837 is an equidigital number, since it uses as much as digits as its factorization.

421754320711837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7902720, while the sum is 55.

The spelling of 421754320711837 in words is "four hundred twenty-one trillion, seven hundred fifty-four billion, three hundred twenty million, seven hundred eleven thousand, eight hundred thirty-seven".