3705409 has 2 divisors, whose sum is σ = 3705410. Its totient is φ = 3705408.

The previous prime is 3705391. The next prime is 3705421. The reversal of 3705409 is 9045073.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2890000 + 815409 = 1700^2 + 903^2 .

It is an emirp because it is prime and its reverse (9045073) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3705409 - 2⁷ = 3705281 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3705469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1852704 + 1852705.

It is an arithmetic number, because the mean of its divisors is an integer number (1852705).

Almost surely, 2^3705409 is an apocalyptic number.

It is an amenable number.

3705409 is a deficient number, since it is larger than the sum of its proper divisors (1).

3705409 is an equidigital number, since it uses as much as digits as its factorization.

3705409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 3705409 is about 1924.9438952863. The cubic root of 3705409 is about 154.7433699963.

It can be divided in two parts, 3705 and 409, that added together give a palindrome (4114).

The spelling of 3705409 in words is "three million, seven hundred five thousand, four hundred nine".