424209997 has 2 divisors, whose sum is σ = 424209998. Its totient is φ = 424209996.

The previous prime is 424209967. The next prime is 424210009. The reversal of 424209997 is 799902424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 404371881 + 19838116 = 20109^2 + 4454^2 .

It is a cyclic number.

It is not a de Polignac number, because 424209997 - 2⁷ = 424209869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (424209917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212104998 + 212104999.

It is an arithmetic number, because the mean of its divisors is an integer number (212104999).

Almost surely, 2^424209997 is an apocalyptic number.

It is an amenable number.

424209997 is a deficient number, since it is larger than the sum of its proper divisors (1).

424209997 is an equidigital number, since it uses as much as digits as its factorization.

424209997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 424209997 is about 20596.3588286862. The cubic root of 424209997 is about 751.3811569054.

The spelling of 424209997 in words is "four hundred twenty-four million, two hundred nine thousand, nine hundred ninety-seven".