1679409 has 6 divisors (see below), whose sum is σ = 2425826. Its totient is φ = 1119600.

The previous prime is 1679383. The next prime is 1679417. The reversal of 1679409 is 9049761.

It can be written as a sum of positive squares in only one way, i.e., 1587600 + 91809 = 1260^2 + 303^2 .

It is not a de Polignac number, because 1679409 - 2⁷ = 1679281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1679459) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 93292 + ... + 93309.

2^1679409 is an apocalyptic number.

It is an amenable number.

1679409 is a deficient number, since it is larger than the sum of its proper divisors (746417).

1679409 is a wasteful number, since it uses less digits than its factorization.

1679409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186607 (or 186604 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 1679409 is about 1295.9201364282. The cubic root of 1679409 is about 118.8644975081.

The spelling of 1679409 in words is "one million, six hundred seventy-nine thousand, four hundred nine".