424291997 has 2 divisors, whose sum is σ = 424291998. Its totient is φ = 424291996.

The previous prime is 424291993. The next prime is 424291999. The reversal of 424291997 is 799192424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 233050756 + 191241241 = 15266^2 + 13829^2 .

It is a cyclic number.

It is not a de Polignac number, because 424291997 - 2² = 424291993 is a prime.

Together with 424291999, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (424291991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212145998 + 212145999.

It is an arithmetic number, because the mean of its divisors is an integer number (212145999).

Almost surely, 2^424291997 is an apocalyptic number.

It is an amenable number.

424291997 is a deficient number, since it is larger than the sum of its proper divisors (1).

424291997 is an equidigital number, since it uses as much as digits as its factorization.

424291997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 47.

The square root of 424291997 is about 20598.3493756175. The cubic root of 424291997 is about 751.4295679014.

The spelling of 424291997 in words is "four hundred twenty-four million, two hundred ninety-one thousand, nine hundred ninety-seven".