435201661 has 2 divisors, whose sum is σ = 435201662. Its totient is φ = 435201660.

The previous prime is 435201643. The next prime is 435201727. The reversal of 435201661 is 166102534.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 330548761 + 104652900 = 18181^2 + 10230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-435201661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (435201601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217600830 + 217600831.

It is an arithmetic number, because the mean of its divisors is an integer number (217600831).

Almost surely, 2^435201661 is an apocalyptic number.

It is an amenable number.

435201661 is a deficient number, since it is larger than the sum of its proper divisors (1).

435201661 is an equidigital number, since it uses as much as digits as its factorization.

435201661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 435201661 is about 20861.4875068869. The cubic root of 435201661 is about 757.8155538483.

The spelling of 435201661 in words is "four hundred thirty-five million, two hundred one thousand, six hundred sixty-one".