4198409 has 2 divisors, whose sum is σ = 4198410.
Its totient is φ = 4198408.
The previous prime is 4198379. The next prime is 4198429. The reversal of 4198409 is 9048914.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 4182025 + 16384 = 2045^2 + 128^2
It is a cyclic number.
It is not a de Polignac number, because 4198409 - 216 = 4132873 is a prime.
It is a Sophie Germain prime.
It is a Curzon number.
It is not a weakly prime, because it can be changed into another prime (4198429) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2099204 + 2099205.
It is an arithmetic number, because the mean of its divisors is an integer number (2099205).
Almost surely, 24198409 is an apocalyptic number.
It is an amenable number.
4198409 is a deficient number, since it is larger than the sum of its proper divisors (1).
4198409 is an equidigital number, since it uses as much as digits as its factorization.
4198409 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 10368, while the sum is 35.
The square root of 4198409 is about 2049.0019521709.
The cubic root of 4198409 is about 161.3224892915.
The spelling of 4198409 in words is "four million, one hundred ninety-eight thousand, four hundred nine".