1673979 has 8 divisors (see below), whose sum is σ = 2237952. Its totient is φ = 1113000.

The previous prime is 1673953. The next prime is 1673981. The reversal of 1673979 is 9793761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1673979 - 2⁸ = 1673723 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1673979.

It is not an unprimeable number, because it can be changed into a prime (1673179) 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 7 ways as a sum of consecutive naturals, for example, 1854 + ... + 2604.

It is an arithmetic number, because the mean of its divisors is an integer number (279744).

2^1673979 is an apocalyptic number.

1673979 is a deficient number, since it is larger than the sum of its proper divisors (563973).

1673979 is an equidigital number, since it uses as much as digits as its factorization.

1673979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1497.

The product of its digits is 71442, while the sum is 42.

The square root of 1673979 is about 1293.8234037147. The cubic root of 1673979 is about 118.7362517786.

The spelling of 1673979 in words is "one million, six hundred seventy-three thousand, nine hundred seventy-nine".