1680677 has 4 divisors (see below), whose sum is σ = 1683276. Its totient is φ = 1678080.

The previous prime is 1680659. The next prime is 1680689. The reversal of 1680677 is 7760861.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 662596 + 1018081 = 814^2 + 1009^2 .

It is a cyclic number.

It is not a de Polignac number, because 1680677 - 2⁸ = 1680421 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 (1680617) 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, 527 + ... + 1907.

It is an arithmetic number, because the mean of its divisors is an integer number (420819).

2^1680677 is an apocalyptic number.

It is an amenable number.

1680677 is a deficient number, since it is larger than the sum of its proper divisors (2599).

1680677 is a wasteful number, since it uses less digits than its factorization.

1680677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2598.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 1680677 is about 1296.4092717965. The cubic root of 1680677 is about 118.8944053043.

The spelling of 1680677 in words is "one million, six hundred eighty thousand, six hundred seventy-seven".