4351409 has 2 divisors, whose sum is σ = 4351410. Its totient is φ = 4351408.

The previous prime is 4351397. The next prime is 4351411. The reversal of 4351409 is 9041534.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3591025 + 760384 = 1895^2 + 872^2 .

It is a cyclic number.

It is not a de Polignac number, because 4351409 - 2¹² = 4347313 is a prime.

It is a Sophie Germain prime.

Together with 4351411, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (4351429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2175704 + 2175705.

It is an arithmetic number, because the mean of its divisors is an integer number (2175705).

Almost surely, 2^4351409 is an apocalyptic number.

It is an amenable number.

4351409 is a deficient number, since it is larger than the sum of its proper divisors (1).

4351409 is an equidigital number, since it uses as much as digits as its factorization.

4351409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 4351409 is about 2086.0031160092. The cubic root of 4351409 is about 163.2588132453.

The spelling of 4351409 in words is "four million, three hundred fifty-one thousand, four hundred nine".