434432021 has 2 divisors, whose sum is σ = 434432022. Its totient is φ = 434432020.

The previous prime is 434431993. The next prime is 434432039. The reversal of 434432021 is 120234434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 434263921 + 168100 = 20839^2 + 410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-434432021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (434432071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217216010 + 217216011.

It is an arithmetic number, because the mean of its divisors is an integer number (217216011).

Almost surely, 2^434432021 is an apocalyptic number.

It is an amenable number.

434432021 is a deficient number, since it is larger than the sum of its proper divisors (1).

434432021 is an equidigital number, since it uses as much as digits as its factorization.

434432021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 434432021 is about 20843.0329127025. The cubic root of 434432021 is about 757.3685661872.

Adding to 434432021 its reverse (120234434), we get a palindrome (554666455).

The spelling of 434432021 in words is "four hundred thirty-four million, four hundred thirty-two thousand, twenty-one".