1670609 has 4 divisors (see below), whose sum is σ = 1673316. Its totient is φ = 1667904.

The previous prime is 1670597. The next prime is 1670623. The reversal of 1670609 is 9060761.

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 2 ways, for example, as 297025 + 1373584 = 545^2 + 1172^2 .

It is a cyclic number.

It is not a de Polignac number, because 1670609 - 2⁸ = 1670353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1670629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77 + ... + 1829.

It is an arithmetic number, because the mean of its divisors is an integer number (418329).

2^1670609 is an apocalyptic number.

It is an amenable number.

1670609 is a deficient number, since it is larger than the sum of its proper divisors (2707).

1670609 is an equidigital number, since it uses as much as digits as its factorization.

1670609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2706.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 1670609 is about 1292.5204060285. The cubic root of 1670609 is about 118.6565195983.

The spelling of 1670609 in words is "one million, six hundred seventy thousand, six hundred nine".