1680477 has 4 divisors (see below), whose sum is σ = 2240640. Its totient is φ = 1120316.

The previous prime is 1680461. The next prime is 1680491. The reversal of 1680477 is 7740861.

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: 7740861 = 3 ⋅2580287.

It is a cyclic number.

It is not a de Polignac number, because 1680477 - 2⁴ = 1680461 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280077 + ... + 280082.

It is an arithmetic number, because the mean of its divisors is an integer number (560160).

2^1680477 is an apocalyptic number.

It is an amenable number.

1680477 is a deficient number, since it is larger than the sum of its proper divisors (560163).

1680477 is an equidigital number, since it uses as much as digits as its factorization.

1680477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560162.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 1680477 is about 1296.3321333671. The cubic root of 1680477 is about 118.8896889857.

The spelling of 1680477 in words is "one million, six hundred eighty thousand, four hundred seventy-seven".