421165411687 has 2 divisors, whose sum is σ = 421165411688. Its totient is φ = 421165411686.

The previous prime is 421165411679. The next prime is 421165411721. The reversal of 421165411687 is 786114561124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421165411687 - 2³ = 421165411679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421165411627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210582705843 + 210582705844.

It is an arithmetic number, because the mean of its divisors is an integer number (210582705844).

Almost surely, 2^421165411687 is an apocalyptic number.

421165411687 is a deficient number, since it is larger than the sum of its proper divisors (1).

421165411687 is an equidigital number, since it uses as much as digits as its factorization.

421165411687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 322560, while the sum is 46.

The spelling of 421165411687 in words is "four hundred twenty-one billion, one hundred sixty-five million, four hundred eleven thousand, six hundred eighty-seven".