421346917 has 2 divisors, whose sum is σ = 421346918. Its totient is φ = 421346916.

The previous prime is 421346909. The next prime is 421346929. The reversal of 421346917 is 719643124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 336135556 + 85211361 = 18334^2 + 9231^2 .

It is a cyclic number.

It is not a de Polignac number, because 421346917 - 2³ = 421346909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421346977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210673458 + 210673459.

It is an arithmetic number, because the mean of its divisors is an integer number (210673459).

Almost surely, 2^421346917 is an apocalyptic number.

It is an amenable number.

421346917 is a deficient number, since it is larger than the sum of its proper divisors (1).

421346917 is an equidigital number, since it uses as much as digits as its factorization.

421346917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 37.

The square root of 421346917 is about 20526.7366378584. The cubic root of 421346917 is about 749.6869312614.

The spelling of 421346917 in words is "four hundred twenty-one million, three hundred forty-six thousand, nine hundred seventeen".