4194405409 has 2 divisors, whose sum is σ = 4194405410. Its totient is φ = 4194405408.

The previous prime is 4194405407. The next prime is 4194405437. The reversal of 4194405409 is 9045044914.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3184119184 + 1010286225 = 56428^2 + 31785^2 .

It is a cyclic number.

It is not a de Polignac number, because 4194405409 - 2¹ = 4194405407 is a prime.

Together with 4194405407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (4194405407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2097202704 + 2097202705.

It is an arithmetic number, because the mean of its divisors is an integer number (2097202705).

Almost surely, 2^4194405409 is an apocalyptic number.

It is an amenable number.

4194405409 is a deficient number, since it is larger than the sum of its proper divisors (1).

4194405409 is an equidigital number, since it uses as much as digits as its factorization.

4194405409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 4194405409 is about 64764.2293940104. The cubic root of 4194405409 is about 1612.7119409260.

The spelling of 4194405409 in words is "four billion, one hundred ninety-four million, four hundred five thousand, four hundred nine".