420301997 has 2 divisors, whose sum is σ = 420301998. Its totient is φ = 420301996.

The previous prime is 420301993. The next prime is 420302011. The reversal of 420301997 is 799103024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 402162916 + 18139081 = 20054^2 + 4259^2 .

It is a cyclic number.

It is not a de Polignac number, because 420301997 - 2² = 420301993 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420301993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210150998 + 210150999.

It is an arithmetic number, because the mean of its divisors is an integer number (210150999).

Almost surely, 2^420301997 is an apocalyptic number.

It is an amenable number.

420301997 is a deficient number, since it is larger than the sum of its proper divisors (1).

420301997 is an equidigital number, since it uses as much as digits as its factorization.

420301997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 420301997 is about 20501.2681802858. The cubic root of 420301997 is about 749.0666891303.

The spelling of 420301997 in words is "four hundred twenty million, three hundred one thousand, nine hundred ninety-seven".