1679977 has 4 divisors (see below), whose sum is σ = 1809220. Its totient is φ = 1550736.

The previous prime is 1679963. The next prime is 1679981. The reversal of 1679977 is 7799761.

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 266256 + 1413721 = 516^2 + 1189^2 .

It is a cyclic number.

It is not a de Polignac number, because 1679977 - 2⁷ = 1679849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1679917) 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, 64602 + ... + 64627.

It is an arithmetic number, because the mean of its divisors is an integer number (452305).

2^1679977 is an apocalyptic number.

It is an amenable number.

1679977 is a deficient number, since it is larger than the sum of its proper divisors (129243).

1679977 is a wasteful number, since it uses less digits than its factorization.

1679977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129242.

The product of its digits is 166698, while the sum is 46.

The square root of 1679977 is about 1296.1392672086. The cubic root of 1679977 is about 118.8778965520.

The spelling of 1679977 in words is "one million, six hundred seventy-nine thousand, nine hundred seventy-seven".