1677971 has 2 divisors, whose sum is σ = 1677972. Its totient is φ = 1677970.

The previous prime is 1677961. The next prime is 1677997. The reversal of 1677971 is 1797761.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1677971 - 2¹⁰ = 1676947 is a prime.

It is not a weakly prime, because it can be changed into another prime (1677941) 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 as a sum of consecutive naturals, namely, 838985 + 838986.

It is an arithmetic number, because the mean of its divisors is an integer number (838986).

2^1677971 is an apocalyptic number.

1677971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1677971 is an equidigital number, since it uses as much as digits as its factorization.

1677971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18522, while the sum is 38.

The square root of 1677971 is about 1295.3651994708. The cubic root of 1677971 is about 118.8305617692.

The spelling of 1677971 in words is "one million, six hundred seventy-seven thousand, nine hundred seventy-one".