6409394 has 4 divisors (see below), whose sum is σ = 9614094. Its totient is φ = 3204696.

The previous prime is 6409393. The next prime is 6409397. The reversal of 6409394 is 4939046.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5121169 + 1288225 = 2263^2 + 1135^2 .

It is a Curzon number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (6409393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1602347 + ... + 1602350.

Almost surely, 2^6409394 is an apocalyptic number.

6409394 is a deficient number, since it is larger than the sum of its proper divisors (3204700).

6409394 is a wasteful number, since it uses less digits than its factorization.

6409394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3204699.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 6409394 is about 2531.6780996011. The cubic root of 6409394 is about 185.7543486969.

The spelling of 6409394 in words is "six million, four hundred nine thousand, three hundred ninety-four".