434221397 has 2 divisors, whose sum is σ = 434221398. Its totient is φ = 434221396.

The previous prime is 434221387. The next prime is 434221423. The reversal of 434221397 is 793122434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 397364356 + 36857041 = 19934^2 + 6071^2 .

It is a cyclic number.

It is not a de Polignac number, because 434221397 - 2⁸ = 434221141 is a prime.

It is a super-2 number, since 2×434221397² = 377096443225263218, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (434221387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217110698 + 217110699.

It is an arithmetic number, because the mean of its divisors is an integer number (217110699).

Almost surely, 2^434221397 is an apocalyptic number.

It is an amenable number.

434221397 is a deficient number, since it is larger than the sum of its proper divisors (1).

434221397 is an equidigital number, since it uses as much as digits as its factorization.

434221397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 35.

The square root of 434221397 is about 20837.9796765425. The cubic root of 434221397 is about 757.2461490417.

The spelling of 434221397 in words is "four hundred thirty-four million, two hundred twenty-one thousand, three hundred ninety-seven".