1673609 has 4 divisors (see below), whose sum is σ = 1912704. Its totient is φ = 1434516.

The previous prime is 1673591. The next prime is 1673627. The reversal of 1673609 is 9063761.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9063761 = 7 ⋅1294823.

It is an interprime number because it is at equal distance from previous prime (1673591) and next prime (1673627).

It is a cyclic number.

It is not a de Polignac number, because 1673609 - 2¹² = 1669513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1673629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119537 + ... + 119550.

It is an arithmetic number, because the mean of its divisors is an integer number (478176).

2^1673609 is an apocalyptic number.

It is an amenable number.

1673609 is a deficient number, since it is larger than the sum of its proper divisors (239095).

1673609 is an equidigital number, since it uses as much as digits as its factorization.

1673609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239094.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 1673609 is about 1293.6804087564. The cubic root of 1673609 is about 118.7275030328.

The spelling of 1673609 in words is "one million, six hundred seventy-three thousand, six hundred nine".