1679813 has 4 divisors (see below), whose sum is σ = 1692768. Its totient is φ = 1666860.

The previous prime is 1679807. The next prime is 1679831. The reversal of 1679813 is 3189761.

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: 3189761 = 17 ⋅187633.

It is a cyclic number.

It is not a de Polignac number, because 1679813 - 2¹² = 1675717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1679833) 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, 6281 + ... + 6542.

It is an arithmetic number, because the mean of its divisors is an integer number (423192).

2^1679813 is an apocalyptic number.

It is an amenable number.

1679813 is a deficient number, since it is larger than the sum of its proper divisors (12955).

1679813 is a wasteful number, since it uses less digits than its factorization.

1679813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12954.

The product of its digits is 9072, while the sum is 35.

The square root of 1679813 is about 1296.0760008580. The cubic root of 1679813 is about 118.8740281241.

The spelling of 1679813 in words is "one million, six hundred seventy-nine thousand, eight hundred thirteen".