421444023017 has 2 divisors, whose sum is σ = 421444023018. Its totient is φ = 421444023016.

The previous prime is 421444022957. The next prime is 421444023019. The reversal of 421444023017 is 710320444124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 342454358416 + 78989664601 = 585196^2 + 281051^2 .

It is a cyclic number.

It is not a de Polignac number, because 421444023017 - 2¹⁸ = 421443760873 is a prime.

Together with 421444023019, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (421444023019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210722011508 + 210722011509.

It is an arithmetic number, because the mean of its divisors is an integer number (210722011509).

Almost surely, 2^421444023017 is an apocalyptic number.

It is an amenable number.

421444023017 is a deficient number, since it is larger than the sum of its proper divisors (1).

421444023017 is an equidigital number, since it uses as much as digits as its factorization.

421444023017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 32.

The spelling of 421444023017 in words is "four hundred twenty-one billion, four hundred forty-four million, twenty-three thousand, seventeen".