421641740017 has 2 divisors, whose sum is σ = 421641740018. Its totient is φ = 421641740016.

The previous prime is 421641739927. The next prime is 421641740021. The reversal of 421641740017 is 710047146124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 414878980321 + 6762759696 = 644111^2 + 82236^2 .

It is a cyclic number.

It is not a de Polignac number, because 421641740017 - 2³¹ = 419494256369 is a prime.

It is not a weakly prime, because it can be changed into another prime (421641740057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210820870008 + 210820870009.

It is an arithmetic number, because the mean of its divisors is an integer number (210820870009).

Almost surely, 2^421641740017 is an apocalyptic number.

It is an amenable number.

421641740017 is a deficient number, since it is larger than the sum of its proper divisors (1).

421641740017 is an equidigital number, since it uses as much as digits as its factorization.

421641740017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37632, while the sum is 37.

The spelling of 421641740017 in words is "four hundred twenty-one billion, six hundred forty-one million, seven hundred forty thousand, seventeen".