1679617 has 4 divisors (see below), whose sum is σ = 1778436. Its totient is φ = 1580800.

The previous prime is 1679609. The next prime is 1679627. The reversal of 1679617 is 7169761.

1679617 is nontrivially palindromic in base 6.

It is a Cunningham number, because it is equal to 6⁸+1.

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 1308736 + 370881 = 1144^2 + 609^2 .

It is a cyclic number.

It is not a de Polignac number, because 1679617 - 2³ = 1679609 is a prime.

It is a super-2 number, since 2×1679617² = 5642226533378, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1679627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49384 + ... + 49417.

It is an arithmetic number, because the mean of its divisors is an integer number (444609).

2^1679617 is an apocalyptic number.

1679617 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1679617 is a deficient number, since it is larger than the sum of its proper divisors (98819).

1679617 is an equidigital number, since it uses as much as digits as its factorization.

1679617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98818.

The product of its digits is 15876, while the sum is 37.

The square root of 1679617 is about 1296.0003858024. Note that the first 3 decimals coincide. The cubic root of 1679617 is about 118.8694045508.

The spelling of 1679617 in words is "one million, six hundred seventy-nine thousand, six hundred seventeen".