421394297 has 2 divisors, whose sum is σ = 421394298. Its totient is φ = 421394296.

The previous prime is 421394279. The next prime is 421394329. The reversal of 421394297 is 792493124.

Together with previous prime (421394279) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 349839616 + 71554681 = 18704^2 + 8459^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421394297 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (421394227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210697148 + 210697149.

It is an arithmetic number, because the mean of its divisors is an integer number (210697149).

Almost surely, 2^421394297 is an apocalyptic number.

It is an amenable number.

421394297 is a deficient number, since it is larger than the sum of its proper divisors (1).

421394297 is an equidigital number, since it uses as much as digits as its factorization.

421394297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 41.

The square root of 421394297 is about 20527.8907099585. The cubic root of 421394297 is about 749.7150307000.

The spelling of 421394297 in words is "four hundred twenty-one million, three hundred ninety-four thousand, two hundred ninety-seven".